transmission blown?

[slayer6466]

hey guys I've been having nothing but problems with my 66.I gone through 2 trannys that have given me the same problems.whenever I have it on our lift it goes thru all 3 gears like it should but once on the ground it only goes thru the second gear and is red lining at 50 mph.doenst want to get out of second gear while driving but on the lift goes thru all three gears.The trannys a th400.ANy ideas?

 

[Fanatic4Christ]

since this is a computer forum, i'd say not very many people will know but if you go over to a site like http://www.carforums.net/forum.php? then maybe you'll get ALOT more help. did you check the transmissions to see if anything looked worn out in them?

 

[superman22x]

Knowing what kind of tranny you have, and what kind of car would help A LOT.

 

[Trivium Nate]

try changing the tranny fluid?
idk im a noob sorry and good luck

 

[Remeniz]

hey guys I've been having nothing but problems with my 66.I gone through 2 trannys that have given me the same problems.whenever I have it on our lift it goes thru all 3 gears like it should but once on the ground it only goes thru the second gear and is red lining at 50 mph.doenst want to get out of second gear while driving but on the lift goes thru all three gears.The trannys a th400.ANy ideas?

When you say 'on the lift' I assume you mean the wheels are off the ground?

The tranny will go through all the gears on a lift. If it won't on the ground then you need to look at the internal oil pressure. If the pressure is low then you wont get 3rd or 2nd sometimes. Also if you can adjust the brake bands then make sure they're adjusted up to the correct torque. Check the govener near the output shaft too.

 

[Tommy Boy]

When you say 'on the lift' I assume you mean the wheels are off the ground?

The tranny will go through all the gears on a lift. If it won't on the ground then you need to look at the internal oil pressure. If the pressure is low then you wont get 3rd or 2nd sometimes. Also if you can adjust the brake bands then make sure they're adjusted up to the correct torque. Check the govener near the output shaft too.

Automatic transmissions rely a lot on the pressure of the tranny fluid. Maybe you need to replace the pump? Maybe you have some bad clutch packs on 3rd gear? Maybe something is in the wrong place on the valve body, they have a complicated system of veins, ball bearings and springs that if not installed correctly will not function properly. If it's been rebuilt before something like that may have happened.

You just really never know until you tear into it. Auto's are complicated pieces thats for sure.

 

[setishock]

Ask Buzz over at computervitals. He's a gearhead.