4wd transmission proplems, broke gearbox then diff and transferbox updated with broken gear selec Options

[tufy]

2 months ago i broke my gearbox, because i coulnt find stronger gearbox for daily use, i installed a 2nd hand standart gearbox which was slightly shorter... after i installed this g.box, traction of my car was more like front wheel drive.. (%60 front and % 40 rear. thats what i feel). then when i make a quick start i started to feel that rear diff. is slipping gears. after 3000 km i break my rear differential.
does anybody knows if ratio of g.box diff ratio and rear diffrential ratio change it make diff stress and broke easier. or my diff. broke from too much power.
simply;
does it make proplem in a 4wd car if i have shorter ratio gearbox without changing diff..
sorry for my bad english. and thanks for your help.

This post has been edited by tufy: Apr 17, 2007 - 9:49 AM

[Kwanza26]

2 months ago i broke my gearbox, because i coulnt find stronger gearbox for daily use, i installed a 2nd hand standart gearbox which was slightly shorter... after i installed this g.box, traction of my car was more like front wheel drive.. (%60 front and % 40 rear. thats what i feel). then when i make a quick start i started to feel that rear diff. is slipping gears. after 3000 km i break my rear differential.
does anybody knows if ratio of g.box diff ratio and rear diffrential ratio change it make diff stress and broke easier. or my diff. broke from too much power.
simply;
does it make proplem in a 4wd car if i have shorter ratio gearbox without changing diff..
sorry for my bad english. and thanks for your help.

Hmm... interesting question. It can potentially cause a problem if you don't have matching front and rear final drives, which is what I think you're reffering to. Say for example the front transaxle, or transfer case is a 4.1 ratio and the rear is a 4.7... then you'll get some slippage in the rear because it'll try to turn a bit faster than the front with the same load. Hmm. Speaking from building trucks... this wasn't a problem because the transfer case and and front diff operated for the most part independently... but with an AWD transaxle... I dunno. I'll have to research this... heheh...

[tufy]

Hmm... interesting question. It can potentially cause a problem if you don't have matching front and rear final drives, which is what I think you're reffering to. Say for example the front transaxle, or transfer case is a 4.1 ratio and the rear is a 4.7... then you'll get some slippage in the rear because it'll try to turn a bit faster than the front with the same load. Hmm. Speaking from building trucks... this wasn't a problem because the transfer case and and front diff operated for the most part independently... but with an AWD transaxle... I dunno. I'll have to research this... heheh...

this is exactly what i ask... but probaply if i feel like car has more traction at front, then front transaxle ratio should be bigger.. am i right?