Auto Tranny 904 for 85 XJ with 2.8

[JeepinGoose]

Works 90% of the time in drive, and only 20% of the time in reverse. I think it needs a total rebuild, but i hope someone will tell me otherwise. any suggestions? I allready changed fluid and filter wernt too bad anyway, not a lot of metal shavings thank God.

 

[8Mud]

Does it ever hang shift? Like you have to run up the RPM´s to get it to shift?

 

[muddytires]

Had same sort of problem with my old 2.8. Before you rebuild( expensive) Check all of the transmission linkages. some times they loosen or need adjusting. Cant remember how .check a repair manual.They are i little hard to get to,but pretty easy. Another shifting problem i had with the same trans requeired dropping the pan and adjusting a threaded rod. Sorry can't help more,im just a shadetree mechanic not a pro. In my case i try the simple stuff first before spending a fortune at the transmission shop.

 

[JeepinGoose]

Does it ever hang shift? Like you have to run up the RPM´s to get it to shift?

kinda hard to say i still have a fuel delivery problem to worry about b4 i can drive it enough to decide that.

 

[JeepinGoose]

In my case i try the simple stuff first before spending a fortune at the transmission shop.

well i dont plan on going to the shop, i have a few good friends who have rebuilt this tranny before, and just so everyone knows... the guy who had it before me says he drove it daily until the tranny started acting up, his mechanic said its the pump inside the tranny. but i dont know who this mechanic is or if hes worth the gojo he washes his hands with.

 

[muddytires]

i thought mine was a major thing. did a few little adjustments and fixed it.Apart from that it was a stong transmission never let me down. And i abused the crap out of it.

 

[8Mud]

Over the years, I´ve played with more than a few auto trannies, I sometimes muddled onto a fix. Do remember the torqueflite series tranny was, sensitive to the pump pressure, which is mostly controled by the kick down (linkage or cable).
Common problem in the torque flite, is dirt or oil varnish in the valve body.
Front and rear band adjustment is pretty easy (on the three speed), but the bad news is you have to remove the pan to adjust reverse.
The 904 is the three speed and the 907 is the four speed? Been awhile.
Rebuilds, have a habit of garbage, collecting in the valve body, sometimes hard to get it out of there. If your model has the band adjustments and they don´t help. I´d think about the valve body and or a partialy plugged cooler. have also heard of guys overtightening the cooler line adaptor and blocking the oil flow.
I have a trick for trying to dislodge junk from the valve body, but I only use it as a last resort.