Slack drive train

[ZippyTT]

Can anybody help?

 

I seem to have quite alot of slack in the drive train. Whilst backing off and then accelerating again in 1st / 2nd / 3rd there is a thud as the transmition takes up the slack. Also a bit of a thud when pulling away. It's a 6sp manual with 56,000 on the clock.

 

Is there any way of adjusting this out or is it something in the diff. / mounts?

 

I have done a search but cant find anything. Any help would be great.

 

Thanks in advance.

 

Zippy

[Robzki]

Rear diff mounts or gearbox mounts?

 

With 56k on the clock I would doubt there would be internal wear unless it had been truly thrashed.

[Samurai 20V]

I only get this when the car is cold.. Is that normal?

 

Car seems fine when warmed up..

[ZippyTT]

Mine seems to do it all the time.

 

If it is the diff. mounts how big a job is it to change them?

 

Think I best get under the car and have a look around later.

[dwayne]

i get a thud too. i think mine is something to do with the diff cos when i was under the car i turned the prop a bit by hand and could see the driveshafts being pulled slightly inwards towards the diff as they rotated and thats when the thud happens so it could be that mate. still not sure how to fix it though, i have been avoiding the issue cos i dont have a clue

[TTRickeh]

I've always had a bit of a clunk when letting off the throttle at lower speeds/rpm. I've taken the diff off before (and put my new rear diff and subframe mounts on) and rotated the prop by hand and the clunk remains. It seems to come from around the gearbox area so I don't think it is the diff. I assumed it was just a characteristic of the V160/161 gearbox; strong but not very refined.

[monsween]

I've got this too

[ZippyTT]

Any body got a fix, seems to be a few with this problem?

[Jurgen-Jm-Imports]

one way to minimise is replace for aluminium solid bushes that whiftbiz sell..(some of my customers in past have tried but am not sure of results)

 

but to be fair most supras will have this.

 

the v160 and v161 do suffer this.

 

i would not worry about it.

[Homer]

I'd had this too only my old 6spd. There were two issues found

 

1) The flywheel dampener was beyond limits, new flywheel needed. This made a massive difference to the feel of it

2) Diff backlash was quite high. I never did get it fixed, so not sure how much of an issue it was

 

However, 6spds are quite clunky boxes, have you driven another 6spd to see if your one is that much different?

[monsween]

I have to agree with homer, drive/go out in another 6speed.

 

I drove and went out TTRickeh and found the box to be equally as clunky. Was a load off my chest

[ZippyTT]

My last Supra was a 6 spd. Don't remember it being this bad. it was a while ago though.

[ZippyTT]

It's not the box. I know the gearboxes are a bit clunky. It's the slop in the transmition that i would like to improve.

 

Thanks for everybodys input.

[Jurgen-Jm-Imports]

It's not the box. I know the gearboxes are a bit clunky. It's the slop in the transmition that i would like to improve.

 

Thanks for everybodys input.

 

whiftbiz bushes will sort it out mate..

 

its a nice mod to do for the throw..

 

speal to paul he sells loads..

 

easy job to do aswell

[Scott]

The only noise I've ever noticed is sometimes a little clunk going into reverse. Other than that it is completley silent, on off throttle etc makes no difference.

[Silvs]

I know im a noob around here but just throwing this one into the thread. My motor did exactly this issue, two new lower engine mounts solved the problem well into 15,000 miles before i got rid

[Homer]

whiftbiz bushes will sort it out mate..

 

its a nice mod to do for the throw..

 

speal to paul he sells loads..

 

easy job to do aswell

 

Which bushes are you referring to, the shifter mechanism or the greabox support bracket?

 

Either way, stock ones should be fine and not cause the symptoms he's explained. Solid bushes would not be desirable on a road car, they transmit noise and can mask other problems.

[Jurgen-Jm-Imports]

Which bushes are you referring to, the shifter mechanism or the greabox support bracket?

 

Either way, stock ones should be fine and not cause the symptoms he's explained. Solid bushes would not be desirable on a road car, they transmit noise and can mask other problems.

 

gearbox support brackets - i was led to believe this helps with the throw and imporves it ?

[ZippyTT]

As homer said. The gearbox is ok, it's when backing off and the re-accelerating in low gears when the thud happens (without changing gear).

 

From the posts it seems to me that it may be the fly wheel and worn diff. bushes.

 

Will have a look under the car this weekend.

[Jurgen-Jm-Imports]

As homer said. The gearbox is ok, it's when backing off and the re-accelerating in low gears when the thud happens (without changing gear).

 

From the posts it seems to me that it may be the fly wheel and worn diff. bushes.

 

Will have a look under the car this weekend.

if the flywheel was worn your clutch will slip also..

[Josh]

I get it too. It seems to happen mainly in 4th when going about 30-35mph when I let of it makes a clunk noise twice and the car feels like it rocks back and forth slightly as the noise happens.

 

Also while we're on it, as no one answered it in my other thread, when going over bumps, when the gearstick moves (as it normally would), it's making a creaking and squeaking sound. I can't replicate the sound when moving it by hand so I can only assume it's something (maybe gearbox if that's possible) moving around when the car goes over a bump.

[marc_p]

I get it too. It seems to happen mainly in 4th when going about 30-35mph when I let of it makes a clunk noise twice and the car feels like it rocks back and forth slightly as the noise happens.

 

Also while we're on it, as no one answered it in my other thread, when going over bumps, when the gearstick moves (as it normally would), it's making a creaking and squeaking sound. I can't replicate the sound when moving it by hand so I can only assume it's something (maybe gearbox if that's possible) moving around when the car goes over a bump.

 

That sounds like old/worn gearbox mounts.

[TTRickeh]

As homer said. The gearbox is ok, it's when backing off and the re-accelerating in low gears when the thud happens (without changing gear).

 

From the posts it seems to me that it may be the fly wheel and worn diff. bushes.

 

Will have a look under the car this weekend.

 

The noise I get is not when changing gear

[Josh]

That sounds like old/worn gearbox mounts.

 

Is there any way to check this myself and would I be able to spot if they are worn?

 

Thanks for the advice and I'll get under the car at the weekend and have a check

[TTRickeh]

Does anyone know if you should be able to rotate the prop a few cm either direction by hand? If not, what could be the cause of this? I think the issue is connected to that and that the clunking noise is the drivetrain picking up and taking off that slack.

 

Could be gearbox mounts I guess but I wouldn't of thought I could re-create the noise with so little effort on the prop for it to be that?