Why is the 90-96 manual awd tcase different than 98-99?

[silver bullit]

Why is the 90-96 manual awd tcase different than 98-99?

I looked up part numbers at a dealership and they tell me that the 90-96 is part number md758203 and the 98 and 99 are part number md748594.

Whats the difference and how can you make a 92 awd tcase work on a 98?

I was under the impression that 90 are different, 91 and 91.5 are different and 92 up are all the same, not to mention i took the tcase off my 92 awd manual trans and installed it in a bone stock 98 awd manual and had no probs getting it moving till i could get a spare.

Please help me and thanks for the assistance

 

[bastarddsm]

The ratio is different. Also the 98 -99 trans has a different ring an pinion to match the transfer case ratio. You would need to swap in a early ring and pinion to use a 92 transfer case on a 98. Or if it were a high end race car with a different rear end in it, you could change that ring and pinion to match too.

 

[Jungy]

The front diff uses a different ring gear on 97-99 cars so in order to get the front wheels and the rear wheels to spin at the same speed the internal gearing in the t-case was changed to match the the front. in order to use an early t-case you need to swap ring gears on the front diff, pinion gears are the same.

 

[_dOp_skyLINe]

i have more than 1 year with my tranny AWD 99 and transfer case 95 without any problem it runs good, not sounds

 

[silver bullit]

So id have to change out the ring and pinion in the rear didd or the tcase to make it work?

 

[raped]

i have more than 1 year with my tranny AWD 99 and transfer case 95 without any problem it runs good, not sounds

These transfercases are not interchangeable. Doing so can damage the center differential and/or the center differential viscous coupling as these units have different gear ratios.

 

[Hal]

So id have to change out the ring and pinion in the rear didd or the tcase to make it work?

No, just the front differential driven gear (call it ring gear if you will)

Look in ASA (or CAPS) at the drive gear part numbers.

It's the same.

Only the front differential driven gear is different.

It works, I did it in my car (98 gsx)

 

[silver bullit]

No, just the front differential driven gear (call it ring gear if you will)

Look in ASA (or CAPS) at the drive gear part numbers.

It's the same.

Only the front differential driven gear is different.

It works, I did it in my car (98 gsx)

Thats what i say but no one can back it up