rough shifting

hi i'm new to the forum, I just bought a 89 jeep wagoneer automatic 4.0 4x4 for very cheap.The jeep sat for about 4 years,I got it to start and did a tune up change the oil and filter.the question i got is when I drove it home it shifts a little rough. should I put in some lucus tranny lube or should I just go ahead and change the filter and the fluid or go get a tranny flush?

 

Fluid and filter would be a good starting point; personally I don't think I would jump to a tranny flush, but I'm not big on those anyway. Along with the engine oil and filter there's probably no question it needs changing.

 

You've got an Aisan Warner 4spd trans..........An electric shifter, the TCM is located under the right side dash by the glove box (Good thing to keep an eye on, they chafe wires and blow the inline fuse right near the TCM)
AW4 has a SEPERATE vehicle speed sensor in the trans tailshaft which was sort of an "Achilles Heel" for the unit...........Other than that they were pretty "bullet proof".........If'n the TCM doesn't see an appropriate signal(voltage) she won't shift on time..........ALSO those units have a "power/economy" switch.........POWER simply delays the shift allowing the engine to build more RPMs

 

Cherokees don't have that tranny too, do they, wrench? Have towed very few Wagoneers, but Cherokees are pretty common jobs to tranny shops.

 

87 the Wagoneer/Cherokee series got the 4.0 and the AW4 auto........before that they were running Chevy 2.8's and Chrysler "baby" 904's........rebuilt TONS of those
The GRAND Wagoneer was the big bus that had the less than efficient 360 bolted to a Chrysler 727 (an overgrown 904)

 

wrench47, How do I check the signal ( voltage ) and what should be reading. should I use the comfort mode instead the power mode? thank you, Johnny69 p.s. the tranny fliud is still reddish in color and full.

 

O boy........"back in the day", The tester was either the MS1700 (Renaults lovely little unit) or the DRB 2 (Chryslers......) Not sure if a scanner would be able to access TCM info.........and if I remember right, there are 2 speed sensors .one being dedicated to the TCM, the other for speedo/ECM decisions......I don't think the sensor is all that expensive, you may just want to put one in........DOn't have the voltage output specs on hand any more....

 

hey! wrench47, thanks for the info. I'll go tomorrow to the part store and see if they have those speed sensors and try them out. I gotta go there anyway to pick up some tranny fluid for the explorer that i just replace the overdrive servo piston. thank you , johnny69 p.s. I'll keep you posted how It's going.