These are questions regarding either manual or automatic gearboxes and their component parts.

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3
votes
1answer
106 views

91 GMC accelerating problems

I have a 91 GMC 3500 dually 7.4. I recently had my transmission rebuilt and it ran fine for 6 to 7 months. I give it gas and it will go up to 40-45 mph and will stop accelerating like it goes in ...
2
votes
2answers
351 views

What could cause lazy shifting in an automatic transmission?

I'm trying to help out a friend who owns an '03 Chevy Caprice (Holden Statesman in Australia; LS1 V8). His transmission is misbehaving; it doesn't want to upshift unless the engine reaches a high ...
2
votes
1answer
4k views

What is a claw shifted transmission?

How is it different from an ordinary transmission? Is that a comparatively newer technology? If possible also add a few examples of motorcycles and cars which use claw shifting mechanisms. PS: ...
0
votes
1answer
127 views

98' camaro customization for highway MPG

I currently have a 98 camaro T-top 3800 V6 ,5speed live in Texas where people do 80-90mph normal. Also make 13-16 hour drives on a regular basis. Problem is @85/90mph in 5th gear it's going at ...
1
vote
2answers
245 views

Convert Manual to Computerized “Automatic”

I'm wondering if this is possible. With a conventional manual transmission (say, Tremec T56), could I install a small computer to press the clutch, change the gears, etc? Obviously, I would have to ...
1
vote
3answers
423 views

Rhythmic sound coming from rear end

There's a rhythmic sound emanating from my rear end, and I'm not sure what exactly it is. It varies with speed and is consistently present, regardless of clutch in/out, acceleration/deceleration, ...
2
votes
3answers
2k views

1997 Olds 88, trans issue?

A friend of mine pointed me this way due to my current problems; I've been working on this for three weeks and am no closer to diagnosing the issue, so hopefully someone here can point me in the right ...
24
votes
1answer
12k views

Why does the reverse gear in manual transmission cars sound different

When I got a manual transmission car (2003 Kia Rio) I noticed that it makes a winding sound in the reverse gear. Here is an example video that I found that demonstrates the sound. ...
5
votes
1answer
785 views

Manual Transmission Whirs when coasting down, clutch disengaged, shifter in gear

I have a 2004 Nissan Xterra. When I am at speed, usually in 3rd or so, and I am coming to a stop, I disengage the clutch, brake, and coast to a stop, with the shifter still in gear. As I do this, ...
0
votes
1answer
84 views

Operating stick shift [closed]

I drive a car with an automatic transmission, so I always wondered about how stick shift works. For example, say you are driving at 50 mph at 4th gear. When you want to slow down to a stop, do you ...
2
votes
3answers
785 views

gentle vs Forced push of motorcycle gear - wear and tear [closed]

I am new to riding motorcycle. And I tend to use my legs a little forcibly while changing gears. A friend told me that this would cause the gearbox to wear out soon. He suggested me to do it gently ...
3
votes
1answer
6k views

How does a AMT (Automated Manual Transmission) work?

I know that a TCU automates the operation of the clutch. But I'm clueless on how an AMT can do anything a human does using a manual. 1)If you are stopped at a hill. When pulling off, a driver brings ...
1
vote
2answers
8k views

I have an issue with Stepping on gas and no increase in speed

It only happens rarely.. but sometimes when stepping down the gas it would suddenly max out the speed gauge, and you hear the very loud engine noise as if i stepped down the gas all the way, but what ...
3
votes
3answers
771 views

Engine spikes to 5000 rpm when pressing on gas pedal or going uphill

I'm having an issue with my 2001 Solara, and I would like to check out a few things myself before I have a mechanic spend lots of time diagnosing the problem. When the engine is under load -- I press ...
3
votes
0answers
22 views

02 Town&Country not shifting out of first

This has happened three times now, and it's definitely becoming worrisome. While driving on the highway, the check engine light comes on. Nothing seems to be wrong initially, until I exit the highway. ...
3
votes
2answers
3k views

Car I test drove had a high clutch engagement point; why?

I test drove a 2002 BMW 325xi with 80,000 miles on it the other day and while it didn't have any major issues cosmetically or mechanically from what I could see, there was something strange about the ...
3
votes
2answers
3k views

How can I reset the adaptive transmission on my Pontiac G6?

My Pontiac has started shifting hard and sometimes taking a loooong time to find the gear. My first suspicion is that it has MDS (Multiple Driver Syndrome), so I'd like to try the cheapest option of ...
4
votes
2answers
299 views

Can I use a CNC machine or waterjet to make an adapter plate to adapt a 5 speed transmission to a rare, obsolete engine?

I am the sad, proud owner of a Nissan SD33T (Diesel), mated to a 4 speed T-19. The power this engine outputs (101HP, 160#/TQ stock) means it struggles on the highway, and I don't want to sacrifice my ...
1
vote
1answer
105 views

2001 Acura CL hard downshifts

Not sure of a better title, but Ill try to explain what I am experiencing as best I can. I've driven a few different automatic transmission cars with a manual mode. Normally when down shifting (to ...
8
votes
4answers
843 views

What problems may occur if clutch is not used?

I was curious about what problems may arise if clutch is not used when shifting gears. Are the problems similar for both cars and bikes?
4
votes
2answers
187 views

vanagon lurches forward, won't accelerate past 20mph or so

I have a manual 1982 diesel VW Vanagon with a 1996 Passat TDI engine in it. This morning (low 40s temp), accelerating up a hill, heard a hissing sound in left rear. Check tires, no problems. Able ...
2
votes
2answers
533 views

Grinding noise on transmision on a Ford Focus 1.4 i Zetec - 2002

Can anyone help me to find out where this grinding metallic noise comes from? Transmision fault? Bearing gone? or what? Here is how it sounds - http://youtu.be/YGAeINSTtrQ . The first part is when ...
17
votes
4answers
29k views

Driving in second gear at 65+ mph

I accidentally drove my 2000 Grand Marquis on second gear on the highway. I was going 65 for like 5 minutes and tried to get it to 70mph but the car was shaking, when I realized I put it into regular ...
-1
votes
1answer
254 views

Can all transmissions be shifted to neutral at any speed? [closed]

I say there is no such thing as uncontrolled acceleration. The reason for my comment is that I believe it is possible to shift any transmission to neutral at any speed and then you can bring the ...
5
votes
1answer
3k views

Automatic Transmission or Differential Backlash (Play)

I noticed that my car has what it seems to be significant differential play. I have a 1993 Acura Integra with automatic transmission. What I mean by play is simple: say I jack up only one front wheel ...
2
votes
1answer
183 views

CVT on 6 cylinder cars

The 2013 Honda Accord has both 4 cylinder and 6 cylinder cars, however, only the 4 cylinder cars have a continuously variable transmission (CVT). I was wondering... is there any particular reason for ...
3
votes
1answer
132 views

AWD truck doesn't shift smoothly. I was advised to not change the transmission fluid

AWD Mercury Mountaineer. 1997 Automatic transmission. 8 cylinder 5.0L 150k miles. fairly good shape. Pretty awesome truck. From 1st to 2nd gear, the transmission shifts with a light clunk. Also, at ...
4
votes
5answers
4k views

Should you change all of your transmission fluid?

I took my Lexus RX 300 to the shop, to change the transmission fluid. While talking to the tech, he said he sucked out half the fluid and left the other old half there. Is this proper? Shouldn't they ...
3
votes
0answers
108 views

Gearbox Swap '93 model mitsubishi triton MJ

I bought two cars, one as a road vehicle and another as spares. They're both Mitsubishi Triton MJ. My road vehicle is a '93 model and the spare is a '94 model. My question is whether it's possible to ...
3
votes
1answer
140 views

Is my transmission about to go?

I drive a 16 year old Subaru Legacy automatic which still has its original transmission and has never given me a moment's trouble in 16 years. Today while pulling out of a parking spot, I suddenly ...
2
votes
1answer
2k views

Top Speed varies even when using the same bike

I own a Hero Honda CBZXtreme bike. The top speed that I have reached is 122Km/Hr. But I am not able to reach this speed always. Sometimes the speed does not even cross 105 Km/Hr while travelling on ...
4
votes
1answer
150 views

Transmission stuck in neutral

I just recently bought a 1968 Oldsmobile 442 with a brand new transmission put in it. The guy I bought it from said there’s about 1200 miles on it but a few weeks after I bought the car I got in it to ...
2
votes
1answer
4k views

Tranmission fluid changing vs flushing

I have a Hyundai Elantra 2002 with 84K miles. The transmission fluid is pretty dirty and it seems like it needs some attention. I did a little of bit search online and found out some people suggest ...
1
vote
1answer
5k views

VW Polo 2008 won't go into first gear

Okay, so yesterday I stopped at a traffic light on my way home from uni. When the traffic light turned green again, and I was to pull away I could not get the gear into first no matter how much I ...
4
votes
3answers
612 views

Ford TSB covered under warranty?

I have a 2008 Mustang GT which seems to have the exact issue that is described by Ford TSB 09-09-06. TSB can be viewed here : http://www.stangpit.com/wp-content/images/docs/s197-tsb/09-09-06.pdf ...
6
votes
2answers
2k views

Why won't my Honda Rebel shift when idling?

I recently ( and successfully ) rebuilt the engine of my '09 Honda Rebel; she's running well but doesn't want to change gears when idling. If I'm moving she shifts gears without any hanging, ...
7
votes
2answers
16k views

Clutch pedal no longer provides resistance, clutch won't disengage, what likely failed?

A little background information: Car: 1993 Ford Mustang LX [2.3L I4], 5-speed T5 transmission. I bought the car a few months ago, according to the previous owner the clutch was replaced fairly ...
1
vote
1answer
937 views

How to generate involute gear milling Gcode

I need to make some gears/pinions myself. I have access to a high quality 4-axis CNC mill, but not to a lathe. I'd like to cut these gears out of flat stock (facing), rather than round (edgewise) ...
2
votes
2answers
1k views

How does a belt drive CVT variator work?

The title basically says it all, but I am the most interested in what the rollers actually do?
1
vote
1answer
234 views

How well should a slip yoke be polished to give a proper seal?

Gear oil started leaking out of the rear output seal on my '01 Outback started -- onto the exhaust of course, as every fluid in a Subaru seems to do. It's not a lot, but smells terrible. Along with ...
2
votes
1answer
223 views

When looking at a transmission, how can I know if there is a LSD?

How can I know if there is an LSD installed on a transmission from a Dodge Neon 2003? For what indicators should I look for?.
8
votes
3answers
287 views

Switching gears without clutch

I drove manual car for a long time but never tried to switch gears without clutch. Question: given that clutch-less shift is executed properly, does it take a toll on transmission in any way? For ...
3
votes
1answer
1k views

Sluggish Acceleration, Minor Surging

I have a 2000 Infiniti i30 with 160K miles that is in fantastic shape. I purchased it from a mechanic who had gotten it from a customer who basically ended up not wanting it. The mechanic replaced the ...
2
votes
1answer
2k views

Altima Clutch and/or Transmission Problems

I have a 2005 Nissan Altima SE with a manual transmission. The clutch was completely replaced about 7k miles ago. I bought the car about 5k miles ago. At around 2-3k miles ago is when the problems ...
5
votes
1answer
96 views

Major transmission failure - Manufacturing fault?

I have recently purchased a brand new 800cc 4 speed manual dune buggy. As part of my testing after around 3 hours of driving (carefully and without any impacts) the manual transmission has essentially ...
5
votes
2answers
7k views

Engine braking with an automatic transmission

For reference, I've reviewed these three questions: Manually shifting an automatic transmission? Does Downshifting (Engine Braking) Cause Extra Wear and Tear? Is engine braking harmful? I drive a ...
2
votes
2answers
1k views

How much efficiency is robbed from 'pumping loss,' if any?

I'm specifically referring to the loss due to the pistons pulling air through a mostly closed throttle while cruising at highway speeds in a gasoline engine. To give an example, I've always wondered ...
5
votes
3answers
6k views

Semi-automatic car inadvertently driven in manual mode

I have a 2008 Mazda 3 car with a semi-automatic transmission (i.e. it is automatic with the ability to switch to a manual mode). On the weekend, it was driven by somebody else who accidentally put it ...
1
vote
2answers
480 views

Possible to diagnose broken transmission without starting engine?

While I know a little about cars, the bulk of my knowledge came from when I was a kid bolting on stuff to my Honda and racing it illegally. (So, not much.) My '96 Civic DX (5-speed) recently passed ...
5
votes
1answer
3k views

Passing Emissions Test: Can't figure out how to fix code P0705 on a 1997 Nissan D21 / Hardbody / Pickup

So hello. I have had a lot of luck with my other vehicles on forums and a recently became the (hopefully-soon-to-be)-proud owner of a 1997 Nissan D21/Hardbody/Pickup XE. It has 156k miles on it and is ...