t90 replacement?

thats the exact same numbers on mine. it came with an adapter, looks homeade. but works. I measured and double measured everything from length to pilot bearing and it looks like it will fit. now im just cleaning. and thinking about a rebuild as there is a bit of sludge on the bottom of the case and some rust on the inside in spots on the case and shifter.

anyone know a simple easy way to clean it? like an oil pressure wash? haha. ive heard of cleaning out transmissions with diesel. apparently it will clean and absorb the water?

i dont want to rebuild this thing.

 

Definitely would not put any solvent in the transmission.

Once it were installed, I would use clean, new oil and change it every thousand miles until the oil drains nice and clean.

Possibly I would add some ATF, which contains lots of detergent.

The transmission uses ball bearings, but it also has thrust bearings and sleeve bearings, not to mention gears, that depend on the film of oil to prevent metal-on-metal contact. Without oil pressure, the viscosity of the oil is what keeps these surfaces apart.

 

is there any passages within the gears that oil would travel in these? worried about any of that gunk getting in and clogging something.

 

Remove the top shifter of the t98. Put it on a bench, 2 big wd40 spray cans, 3m abrasive scrubbers, safety glasses, nitrile gloves, go crazy... put the t90 shifter top assembly beside and look for similarity underneath the inside on the two rods. If the springs and balls that control the LOCK UP of a gear selection in a gear are the same replace them and oil the heck out of it. IF you need new balls and springs PM me for those parts, I just got done with a rebuild of a t90 and did not use the new replacement balls and springs.

Should be oil passages in the front of the INPUT SHAFT. Its the one that takes the pilot bearing.
You have to tear it apart to look. WD40

 

No way! That would push the combo to like 300# ... No wonder when I picked it up off my work bench, transfer attached, I had a moment while bear hugging it where I had to figure the right way to get it on the little dolly I had (HF wooden w/ wheels) with out hurting myself...
Not sure that was a smart moment.

 

Says here The Novak Guide to the Borg-Warner T98 Transmission that the t98 weighs in at 145lbs.

 

Phew. Puts reality back in my back...

 

A T-18 with adapter on the back and shifter top weighs in at 157 lbs. I would suspect the T-98 to be the same, or darn close. I know this because I've had to help ship LOTS of them all over the country (and sometimes outside the country).

 

thanks for the info Nick; then when you bolt the transfer to it, it has to add I'd guess about 80lbs or so... (?).

 

yep that's why I made a transmission holder for my floor jack , didn't want that thing killing me

 

Here's my bathroom scale numbers.
My Jeep T98-A fully complete with adapters less the mainshaft (output) gear weighs in at 156 pounds.
My short maindrive (7-3/8 stickout) Jeep T18 fully completewith adapters less the mainshaft (output) gear weighs in at 143 pounds.

 

holy crap. well i got the thing into the bellhousing, everything went in kinda smooth minus the whole 7000 lb lift to get it in there. even with rachet straps (dont have a come along or anything) it was a pain. only had to cut about an inch of the floor between the fuel tank and pass side tool box thing.

now im looking at bolting up the d18. it was from one that shared the oil, so, the holes are there. anyone know of a good thread to read up on plugging them? or know of how to plug them properly? all i can think is to tap it and put a small bolt and some thread sealant in there.

this place is awesome for info, thanks everyone for the help so far!!

 

Also. the clutch (i thiink it was the clutch) was on some kinda cable thing that was between some bar connecting the frame to the side of the tcase. now its 5 inches backwards. anyone else deal with this before? easy fix? maybe move frame mount back and get a longer cable?

 

Hi Ryan - normally I would expect there to be an oil seal in the adapter between the transmission and transfer case, and the adapter to block any holes between them. Normally the 4-speed transmissions do not share oil with the transfer case. Sharing only happens with the Borg-Warner 3-speeds.

 

Don,,,

Been busy as hell for a week and had no time to get in here. I can take a picture of the left side of the bell housing. What in particular are you looking for? Just to make sure, you mean the driver's side, correct?

If you are looking at where the cable enters the transmission, as I recall, there is an opening about 1/2" wide with no cover on it. If it was supposed to have something there, mine doesn't have it. I will look to see if I can find a breakdown of the T-98, unless someone else has already posted one in here, and post it for you. I really like that tranny. Many have said it's noisy, but my gear train makes no noise at all until I get into low-low and then it's mainly gear whine.

Later...

 

If you are talking about cleaning the outside, I had to use a drill and a wire wheel to clean it and a lot of time. You can see some of the crud that came off of mine lying on the fiberglass corrugated piece I had it sitting on in the pix below. It was a mess as you can see from the other pix below. If you can wash it out with diesel, I would think it would be good. Just don't spin things at any speed when you do. Don't need to score or scour anything. Use GL-4 lube in it when you get done. GL-5 is not kind to synchro rings and other things made of older bronze.

By the way, I made a mistake when I quoted the weight at 245 lb for the T-98. As others have already pointed out, that should be 145. I call it a "fat finger factor". I wear a size 14 wedding ring and the guys at work call me Shrek because of my hands. That's my excuse and I am sticking to it. Later...

 

im interested in seeing that crossmember!

i got everything bolted together. now im fabing the crossmember, plan is to bolt to stock local on d18 and build a plate / gusset over to the trans mount.