Transmission Rebuild time

[93 Krawler]

Originally Posted by blazerbrad

Talked to a friend who spent some time as a transmission tech and he thinks it might just be a sticky valvebody. Recommend changing the fluid and filter along with some additive to help clean it out. I don't believe in the "rebuild in a can" but sometimes additives or cleaners can fix problems.

Fluid was dirty but still was fairly red. Bottom of the pan had a thin layer of the blackish clutch material but what I would expect. Didn't get to test drive because it was getting late but just cycling between D and R it felt like it was engaging in reverse and would move backwards when you took your foot off the brake.

Changing the fluid in the pan really isn't effective. You can do your own flush with the help of a friend. I do the filter change, add 7-8 quarts, take the trans return line off the radiator "Usually the top line" and put a fitting in the radiator. Attach a hose to the fitting and drop it in a bucket. While your friend is moving the trans in different gears, keep adding fluid so it doesn't run dry. I usually run 15 quarts through and stop. I have done this to a lot of cars and it works great. It gets rid of all the old fluid.

[blazerbrad]

Originally Posted by 93 Krawler

Changing the fluid in the pan really isn't effective. You can do your own flush with the help of a friend. I do the filter change, add 7-8 quarts, take the trans return line off the radiator "Usually the top line" and put a fitting in the radiator. Attach a hose to the fitting and drop it in a bucket. While your friend is moving the trans in different gears, keep adding fluid so it doesn't run dry. I usually run 15 quarts through and stop. I have done this to a lot of cars and it works great. It gets rid of all the old fluid.

Good point. Probably only got about 4-5 quarts out by dropping the pan and it probably holds at least 10 quarts total (converter, cooler and lines, etc...).

[93 Krawler]

Originally Posted by blazerbrad

Good point. Probably only got about 4-5 quarts out by dropping the pan and it probably holds at least 10 quarts total (converter, cooler and lines, etc...).

I'd say closer to 12qts. If you really want to do it right, put Dex 6 back in it. This replaces all previous Dexrons. It's the only one that GM actually approves of and checks on. From what I read, any brand as long as it's Dex6, has been approved by GM. Wal-mart's house brand has Dex6 at a good price. I've used it to flush out several cars.

[blazerbrad]

Short test drive tonight and it feels normal again in the driveway, but no big loads on it. It will chirp the tires on the garage floor in reverse now but still need to get it bound up and make sure it's applying enough power.