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

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5
votes
3answers
276 views

Are there cars that can shift to revers even while moving?

I am aware that a car has to be at full stop in order to shift to reverse. Then I saw a video which was able to do a reverse without even stopping. Insane parking ...
5
votes
1answer
22 views

Car manual says I have to wait a few seconds before shifting to reverse, why?

I am the type to read the owners manual of everything I buy. I am a new driver and I have just read my owner's manual. As the questions says, it's telling me not to instantly shift to revers when I ...
5
votes
2answers
45 views

Why is it that the front of the car lifts up when releasing the clutch?

I don't know much about the inner workings of a car. For driving one, I find that having an rough idea about what the gearbox, engine and clutch do and where they are is often enough. However for the ...
8
votes
1answer
31 views

How does Audi Crown Gear Center Differential work?

I'm trying to understand how the engagement of the clutches is varied. I see the power is transmitted through the center input shaft and is transmitted through the four pinion gears, but I don't ...
4
votes
0answers
19 views

citroen c5 2007, AL4, noise when on R

Sometimes when i change to Reverse, there is strange noise from inside of the car, whats possible cause? the transmission is auto, AL4, and the noise is even if i m not moving(brake pedal)
5
votes
1answer
35 views

1995 Dodge Viper

So my friend is interested in this 1995 Dodge Viper he's seen on a pre-owned showroom and I have some questions that I'd like to ask. What kind of questions related to that specific car should we ...
0
votes
0answers
10 views

use SAE80W/90 instead of EP90 [duplicate]

Can I always use SAE80W/90 API GL5 instead of EP90 for my good old Masport lawn mower's gears? I can't get EP90, which the manual asks for, anymore. ...
5
votes
1answer
24 views

Weird grinding sound from the gear box

It is not like when you try to shift a manual stick without the clutch. But a lot lighter than that varying in amplitude (louder and lower) and probably is only there when the engine is cold (Because ...
6
votes
1answer
57 views

How come gears don’t normally change in an automatic car?

I know that there is a similar question here, and another one here that asks when an automatic gearbox knows how to change gear, but I want to know exactly how it does that. It was brought to my ...
6
votes
1answer
51 views

What does it mean to have a stiff first gear?

This problem is a small one and it can only occur with manual cars, but I have been curious to find out more about it for a while now. Sometimes, when the car is attempting to pull away from a ...
4
votes
1answer
40 views

Acceleration pickup of a car

When I say "Tata Winger can accelerate from 0 to 100 Kmph in nearly 19 to 20 seconds, which is quite good for this class" - how is it measured? Is this by accelerating the car from 0 to 100 kmph on a ...
11
votes
1answer
85 views

Why don't cars use Sequential gearboxes?

I have always felt that the Sequential Gearbox configuration is much much faster than a ordinary gearbox used in cars. Why is this design used ? Any advantages? Note: I am aware that racing ...
4
votes
0answers
40 views

2008 Vw Jetta won't move? Transmission issue!! Help [closed]

I have a 2008 Vw Jetta 2.5l. On the way to work this morning I stopped at a stop sign and when I took off I heard a clunk and had to coast off the road. It is an automatic transmission and I can put ...
6
votes
1answer
29 views

Scania clutch issue with syncromesh gearbox

The clutch of our 124 Scania stopped working properly with the "14 speed" syncromesh gearbox. The first time it happened, it ground instead of smoothly going into reverse (a non-syncro gear), to back ...
4
votes
1answer
41 views

What is meant by the term “gear ratios”?

I don't really understand the idea behind gear ratios. Does this just mean essentially that the gears (cogs) are all different sizes? What specifically does the term "gear ratios" mean?
3
votes
1answer
34 views

What exactly is a gearbox?

You know that gear stick that we all use so much? Well, I know what it does in the sense that I know how to change gear and drive a car with a manual gearbox, but I don't know much more than that. ...
8
votes
1answer
398 views

Why did manufacturers go to other than 1:1 transmission ratios?

While reading this question it came to mind: Why did manufacturers start building transmissions without a 1:1 ratio? In the older transmission you'd see the 1:1 ratio all the time, either as the ...
13
votes
4answers
1k views

Why do 5- and 6-speed transmissions typically need different gear ratios?

My 2013 Subauru WRX has a 5-speed manual, and I long for it to have a 6th gear when cruising on the highway. A friend has a 2012 Subaru STI with a 6-speed manual, and I noticed his car runs through ...
5
votes
0answers
45 views

Th400 Transmission help

I pulled my Th400 out of my K20 Chevy and I'm in the middle of rebuilding it and I was resembling it and when I went to put the completed gear train assembly in it and the center support assembly gets ...
6
votes
2answers
53 views

Gear selection on 6 speed box

Hi I have a Peugeot 308 1.6 ehdi with a six speed manual gearbox and have noticed that when selecting first or sixth gear it does not go in smoothly it can be notchy or clunky this is quite annoying ...
7
votes
1answer
26 views

I own a 1989 Mercedes 560sec that has rpm surges for no real reason

It happens once or twice a month, I could be doing 60 mph, and its almost redlining at 5000 rpm!. Once the vehicle gets to normal operating temperature, and I turn it off for a few minutes and turn it ...
3
votes
1answer
32 views

1998 Nissan Sentra transmission

Why does a 1998 Nissan Sentra Automatic transmission change to neutral from reverse while going downhill? This just started a couple of weeks ago. The engine shut off the first couple of times it ...
3
votes
1answer
90 views

Transmission damage due to uneven tread wear on AWD vehicle

I have a 2013 Subaru Impreza with a continuously variable transmission with ~40k miles on it. About two months ago I blew out the front right tire and took it to a tire shop. The folks at the tire ...
3
votes
1answer
38 views

What would go into a tranny swap on a modern vehicle

I have a 1999 Isuzu trooper and I have been toying with the idea of doing an engine and transmission swap on it. If all goes well with the engine I plan on getting I would like to replace the ...
-2
votes
1answer
21 views

problem changing gear volkswagen polo 2001

I have problem changing gear with my volkswagen polo 2001. I was told that a ball is missing chendra Alwar
1
vote
1answer
31 views

I have a 2000 Suzuki Grand Vitara 5 Speed Ticking noise

I hear a ticking noise coming from the driver side rear end, possibly coming from the differential, not sure though because i checked out the pinion gear and i don't see any chips off any of the ...
4
votes
1answer
41 views

Auto Trans gear selector does not engage ANYTHING?

2002 BMW 325xi. It has the GM 5L40-E auto trans. The vehicle disengaged drive while moving. My g/f was driving the car and the transmission was engaged i.e. power was being transmitted from the ...
2
votes
1answer
54 views

how electric car transmission system work

How electric car transmission system working? Is it having auto or manual gear concept like gasoline vehicles? AS electric motor can run in any speed (slow). Is it necessary to have clutch?
2
votes
1answer
61 views

Why does my gear-shift lever seem to freeze in position sometimes?

My 1996 Ford Escort shift lever sometimes won't move into 1st gear position unless I turn the motor off, then start in that gear. It also, sometimes, won't move into any of the gear positions and I ...
0
votes
1answer
37 views

Chevrolet 6L90 transmission interchange

Are 6L90 transmissions interchangable between the different types of vehicles that GM puts them in? Example: Camaro and Silverado 2500HD
4
votes
1answer
65 views

Banging sounds coming in front of my car

I'm having a banging sounds coming from the front of my car. Usually they appear after 5-10 meters when I'm driving. It's like one small knock and then around 5-6 more knocks and then they stop until ...
4
votes
1answer
80 views

Transmission Grinds only in second gear - Need Assistance

I have a 2003 Cadillac CTS, 6 cylinder 5 speed. 104,000 miles. changing from 1st-2nd gear, After letting out the clutch in 2nd gear it has a grinding sound until I shift to 3rd. And only 2nd gear has ...
0
votes
1answer
67 views

1996 Ford Explorer Speedometer and Shifting issues, O/D light flashing

My 1996 Ford Explorer began having issues at the end of a moderately long drive home while going approximately 60 miles per hour (not sure if related; I drive that speed often). The speedometer ...
4
votes
1answer
152 views

Why are most motorcycles 5 speed than 6 speed?

I have a Honda Trigger motorcycle. I have seen most of the motorcycles even like Karizma ZMR having 5 gears. What would be the reason to have just 5 gears even for 223 cc motorcycles?
2
votes
2answers
143 views

Problem in First and 2nd gear in VW polo

Dear i am facing problem in first and 2nd gear in my VW POLO DIESEL car.i am unable to move car in these gears,i tried it so many times.so for the time being i used 3rd gear to move the car & ...
2
votes
2answers
56 views

Near stalling shake at slow turns

It is 2012 Skoda Octavia 1.4 TSI DSG7. When slow turns (i.e. u turns), car starts to shake like it is about to stall. The rpm is low but stable, engine sounds under-rpm, tiny vibration on steering ...
3
votes
1answer
25 views

6L90 Transmission swap

I'm swapping out a worn out 6L90 transmission that has over 220k on it in a 2011 GMC 2500 HD with one that has 89k on it from an identical truck. Will it have to be reflashed or reprogrammed to work?
3
votes
1answer
58 views

Gearbox impact of skipping gears driving downwards

I have a driving habit that i guess is harmless to the vehicle, and i want to hear your opinions on the matter. Sometimes i change the gears, for example, 1st then 3rd then 5th, when i am driving ...
2
votes
1answer
67 views

Hesitation in RPM drop when shifting manual transmission, 2007 Mazda6

I recently said goodbye to a 2002 Mazda Protege that made it to just over 300,000 miles. So naturally I purchased another Mazda - 2007 Mazda6, 5-speed manual, 91k miles. Besides the difference in ...
3
votes
1answer
172 views

Manual Transmission- Can bad shifting destroy transmission

Been driving a car with a manual transmission for 6 years. I never had to replace the clutch but the transmission recently blew up on me. I was aware that my car was leaking transmission fluid for ...
4
votes
1answer
136 views

What is “Long Gearing”?

I see in some city car reviews, like the Citroen C1, that they have something called "Long Gearing". What is Long Gearing? What are the implications of it?
3
votes
0answers
33 views

Transmission not responsive - Dodge Durango 2001 slt 4.7

My truck was in a salt water flood when hurricane Sandy hit New Jersey. Since then, the motor was replaced, ECM computer, shocks, ball joints, hubs, rear, front calipers, power steering pump, A/C ...
2
votes
2answers
39 views

2006 Pontiac Montana

I recently purchased a 2006 Pontiac Montana and the dealership seems to have a done a pretty good job with pre-lot reconditioning. The filters were changed, oil, and a new battery and tires were put ...
4
votes
1answer
144 views

Is it bad to shift into reverse while still moving forwards?

I often put my manual car into reverse while still moving forwards. I do it at less than 10mph. However, sometimes the gears crunch. Am I doing any damage by doing this? Why do the gears crunch? I ...
2
votes
1answer
21 views

99 Jetta transmission trouble

My wife's 99 Jetta is very hard to get into 1st gear. 2 out of 3 times you will hit 3rd gear. She often has to start off from 2nd gear. Is there a way to adjust the linkage or something to allow more ...
6
votes
3answers
3k views

Is it bad to drive slow at low rpms in 4th or 5th gear? Do you get better gas mileage?

Obviously running your engine at too high an RPM for too long isn't good. But what about running it too low? not so low that it stalls or lugs, but within around 1,000 RPM? Would you get better ...
1
vote
1answer
66 views

Downshifting to a stop- wear and tear?

I drive a Mustang GT, and I love the deceleration "pop" that you get when the engine revs climb without the accelerator being pressed, so as one might surmise, I tend to downshift to a stop at lights ...
2
votes
1answer
48 views

Cars 101: How is torque conveyed from transmission to differential?

This is a very basic question. I understand that the torque is passed from the engine onto the transmission via the flywheel in manual transmission or flexplate in case of automatic. The transmission ...
4
votes
1answer
75 views

Safe Way to Remove Engine Mount Support?

I'm working on a 98 Mazda 626 2L and I'd like to change the transaxle oil filter. However, a number of the pan bolts are blocked by a beam which has an engine / transmission mount sitting on it ( see ...
2
votes
1answer
322 views

Occasional Crunch/Grinding noise when shifting into first gear at speed

When I am doing about 30-20mph, and am about to stop at a junction, where I know I will have to stop, I shift my car into first gear However, sometimes when I do this, it makes a quick gear grinding ...