Transfercase Identification

[RedWrang]

1041938

How can I tell which transcase I have. And front and rear diff also. I have an 87YJ 6cyl with auto transmission. What do I look for. Thanks[addsig]

 

[berettajeep]

1041958

transfer case is a Chrysler 999,i believe the only auto for '87-95 YJ's

front axle is a Dana 30

rear axle is a Dana 35

transfer case is either a NP-207 or a NP-231



NP-207

NP-231



hope this helps

[addsig]

 

[RedWrang]

1041965

Ok is my transfercase a Chrysler or an NP231/NP206. Or are you saying its a Chrysler NP231.[addsig]

 

[berettajeep]

1041970

your transmission is chrysler

the transfer cases are New Process which became New Venture



sorry about my mistake

[addsig]

 

[RAVEN13xxx]

1041979

NP-231 t-case with d30 front and either d35 rear or d44. Probably the d35.[addsig]

 

[BobJ]

1041982

YJ's have a NP/NV231 t-case, a reverse rotation Dana 30 in the front, and a standard Dana 35 in the back.



Your transmission is a Torque Flight 999.

[addsig]

 

[RedWrang]

1041986

Ok folks thanks for the help. Now the question is are these parts ok or should they be upgraded. Mostly road driving , occasionally offroad. [addsig]

 

[BobJ]

1041989

The D35 is the weak link. The transmission and t-case are very strong and have been used in a few v8 applications from the factory. I wouldn't worry about the front axle unless you're going over 35"s with the tires.



As for replacing the D35, it depends on what your future plans are, with what's listed in your sig you should be fine, however if you're not careful with the gas you might break stuff.[addsig]