tranny fluid change

[profox02]

Ive got transmission fluid leaking, on my '91 chevy p/u...350 w/700r4..the leak is coming from the gasket around the pan...my ? is there any tips and tricks to changing the gasket and filter..?...I dont want to take it to the shop cuz Im a little short on cash.....I dont have my hayes manuel in front me..how many quarts does it take ?...also what brand of gasket is good..?
Thx for ur replies..

[2000CAYukon]

Originally Posted by profox02

Ive got transmission fluid leaking, on my '91 chevy p/u...350 w/700r4..the leak is coming from the gasket around the pan...my ? is there any tips and tricks to changing the gasket and filter..?...I dont want to take it to the shop cuz Im a little short on cash.....I dont have my hayes manuel in front me..how many quarts does it take ?...also what brand of gasket is good..?
Thx for ur replies..

I have a 90 GMC K1500 350 with 700R4. It takes 4+ quarts when you change the filter. I usually buy 5 quarts. Refill with 4 and then check the level after it has warmed up. I usually buy a Wix filter which comes with a gasket.

When you remove the old filter, the o-ring can get stuck inside the tranny. Make sure to remove it before reinstalling the new filter. Also lube the new o-ring with tranny fluid before reinstalling.

A tranny gasket should be reinstalled dry (no gasket cement). I also installed a drain plug to make changing the filter easier.

//2000CAYukon

[profox02]

thx for da info

[profox02]

well...good and bad news....
changed the fluid and filter on sat. and didnt drive it till monday to go to work...got to work and no leaks(good news)....after work went home and tranny seemed to run a little hot..and didnt seem to want to shift into overdrive...got home checked under my truck...leaking again in the same place(bad news)...wtf..did I miss somthing...ive seached all over this thing and the leak is from the gasket...could my pan be the problem??

[2000CAYukon]

Originally Posted by profox02

well...good and bad news....
changed the fluid and filter on sat. and didnt drive it till monday to go to work...got to work and no leaks(good news)....after work went home and tranny seemed to run a little hot..and didnt seem to want to shift into overdrive...got home checked under my truck...leaking again in the same place(bad news)...wtf..did I miss somthing...ive seached all over this thing and the leak is from the gasket...could my pan be the problem??

It is possible that the pan is not flat. I should have mentioned to check it for flatness by laying on a flat surface to see if it rocked.

The other possible issue if over tightening the pan bolts. It can cause a bad seal.

First thing to check if any of the bolts are loose.

//2000CAYukon

[Riche]

Give a close inspection to the bolt holes. The area between them should be flat on the table (or flat surface used) If there is a gap then that is a sign that the bolts may have been over tightened. It will leak every time...

[profox02]

well ill have to pull it off it again..to check it the pan is damaged..ill just get another pan aswell..thx for ur replies

[profox02]

well havent droped the pan yet...but, last night as i was looking at it again...with the dust shield off ...there was fluid onthe torque converter..and it looks like its leaking from where the converter meets the tranny..my buddy said there is a bushing there and it could go out...is this bushing fairly easy to replace?...and could this be my problem...?

[MT-2500]

No it is not easy.
You have to remove transmission and transfer case.
And pull the front pump out of transmmission.
How good is the rest of the transmission?
If you remove transmission and front pump you are half way into a transmission rebuilt.
If the front pump bushing is bad I am sure there is other problems there to like pump worn out and converter shaft bad.
Just replacing the pump bushing and front seal may like a band aid fix.
MT

[profox02]

my truck is 2wd ....does this make any easier?...and the tranny was rebuild by ammco one and a half years ago...so if this is my problem ....is a new tranny or rebuild nessesary..?

[MT-2500]

Originally Posted by profox02

my truck is 2wd ....does this make any easier?...and the tranny was rebuild by ammco one and a half years ago...so if this is my problem ....is a new tranny or rebuild nessesary..?

Yes a 2 wheel is a lot easy to R and R. No transfer case. Gravey job!!!!
But if it is leaking fluid at the front pump seal it is usually more trouble than just front seal or bushing.
To replace the front pump bushing you have to remove the front pump from transmission and check thing out.
A ammco rebuild a 1-1/2 years ago is not very good news or does not say much for it.
Look things over real good when you have the front pump out.
Pull the pan and see what is in the bottom of the oil pan.
Is the transmission working good outside of the leak?
If just leak at front seal pull the front seal and peak in there at the bushing.
If the bushing is bad you may have other problems to.
If you are lucky and bushing is good May just be a bad seal.
Good Luck
MT

[profox02]

the tranny feels fine...shifts good...when i pulled the pan..no metal at all just tranny fluid dat needed changing...im really thinking its the seal..if its that compicated..i just take it in to another shop..besides aamco...