right fitted my 2nd hand ppg box 9f-ty752vbcaa an got a rear diff which was from the same vehicle now when i reverse or go forward slowly it seems to jump an you can feel it through the rear wheels any suggestions on what it could be an if the rear diff did not match would this cause this ?????

also it never happened with my old box an diff ???

 

has the rear diff had any thing done to it?

 

thats what i am thinkin mate not sure, it has been apart as can see new sealant on it so may be just due to what is in there???????? hopefully what can it be if has got stuff done ??????

 

Was the rear diff from THE same vehicle or from another car?

Also, is this when cornering/turning slowly? IE plated rear diff set tight?

 

You sure that is a 752 PPG not 754?? If it is a 752, it is quite old and really ought to have a mod done to the casing bolts to try and hold it together. The case flexes on the early boxes and can cause problem with gear mesh etc etc.

Sounds like either the rear plated LSD diff is set too tight for road use OR the drop gears in the gearbox do not match the rear diff and you are experiencing transmission wind up, which will ultimately break the centre diff.

Either way it is not good.

Or of course, the rear diff may not be the one from the car that matched the diff ratio of the front diff. In which case transmission wind up again.

Needs looking at by someone who knows what they are doing:- soon.

David APi

Agents for Simtek, the most exciting new Ecu for years

 

been looking into this today an awaiting a reply as think it has been set up tight for a reason it dont do it in a straight line it dont jump or anythin goin straight so seems as though the ratios are correct an it did come out of a running car both the diff an box so is the same ratio (aparrently) so should be fine.

yes david it is on a 752 casing mod may have been carried out finding out today who built so no what has been done to gearbox an diff

 

is it ok to take tonight daz or not

 

no not gonna drive it mate