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Installed a Sonnax Center Support Seal Kit. I will be installing a Seal Aftermarket Stabilizer Kit on the trans I’m removing though. I’ll build it myself and have it standing by for any future needs. The Seal Aftermarket Stabilizer Kit is much beefier and really locks the center support to the case. The Sonnax kit just helps to prevent leaks at the factory seal.
Bellhousing side of pump surface….notice the scuffing that’s already present and the machining marks. The machining marks act as “wipers” which literally squeegees the fluid film away resulting in metal to metal contact. You can catch a fingernail on some of the scuff marks.
Quick Polish with Super-Micro finish belt. Few more pieces to go then I’ll apply some tungsten disulfide on the polished areas. Also switching over from OE aluminum bushings to bronze bushings. After removing the OE aluminum bushings I lightly dress the area the bushing sits in with 60grit sandpaper to help give some bite to the new bushing and prevent spinning.
Polished stator areas where bushing and bearings ride
Polished input shaft where it rides on stator support bushing
Last edited by Petraszewsky; Dec 10, 2023 at 02:23 PM.
Surprised it lasted as long as it has. The fluid only has about 30K miles on it. Smells horrible and lots of metallic dust. Halfway done taking it out of the truck. Hardest part will probably be lifting the truck high enough to get the trans out from underneath it.
Surprised it lasted as long as it has. The fluid only has about 30K miles on it. Smells horrible and lots of metallic dust. Halfway done taking it out of the truck. Hardest part will probably be lifting the truck high enough to get the trans out from underneath it.
You need ~20" from the ground to the frame. I jacked my Tahoe up by the suspension (up front) and axle (out back), and stacked 2x6's under the wheels to gain the height needed to slide the trans out from under
If you use a trans jack, just make sure to add that height in to the "equation"
Once I had my new trans under the truck, I lowered her back onto the concrete (no wood) so I didn't have to reach as far. Your results may vary- my truck is ~3" taller than stock and I am only 5'10 and most of that is legs. #BuiltLikeaTRex
Thanks for the pointers….I have a trans jack and plan on using it to lower the trans after separating it from the block. My other idea was to slide the trans off the jack onto the ground since the jack sits like 5” high or more. I thought about using a piece of 4x4 or 6x6 on my floor jack to give me some extra height while lifting the frame. I do have 4x “stands” that I made out of stacking 2x4s and drilling together years ago. After you mentioning that I’ll place those under the tires while lifting for some added safety. It should slide out easily enough at least I think anyways. I have an old rug that I use when working on the concrete which should help with the slide. Just nervous about lifting the truck so high on the one side. My kiddie pool drain pan had a crack in it I didn’t know about and made a giant puddle of burnt trans fluid under the truck. I guess I cracked it when I was installing a shift kit and flushing a 4r100 a couple of weeks ago. DOH!
The 4R100 has 350,000miles on it and the fluid had never been changed.
Last edited by Petraszewsky; Dec 11, 2023 at 05:48 PM.
You ever hear about the guys that won’t change fluid in high mileage transmissions bc they are afraid the material in the fluid helps with friction? I know of several 4l80’s that the owners won’t change it out. Lol
My father also told me about hearing that changing high mileage transmission fluid would make one “go out”, act weird, or start slipping. I’m a little skeptical of that myself. It’s my belief that if one goes out after putting fresh fluid in that it was on its way out anyways but that’s just me. I might bite my tongue if the 4R100 bites the dust soon though. I was generous with the size of the calibration plate holes. I think I went like .010-.020 over the first recommended size. It shifts really firm now. Definitely more aggressive than it was prior.
Dec 5, 2023 | 08:07 AM
