TH 400 Turbo problem!!
#1
TH 400 Turbo problem!!
hello guys
I have a problem with the transmission, I have a TH 400 of 1967 and at some point no longer enters the secod and third gears, first gear and the back work fine.
Oil is ok and the new
all internal components are new
everything worked fine.
Can you help me?
thanks!!!!
I have a problem with the transmission, I have a TH 400 of 1967 and at some point no longer enters the secod and third gears, first gear and the back work fine.
Oil is ok and the new
all internal components are new
everything worked fine.
Can you help me?
thanks!!!!
#3
hello guys
I have a problem with the transmission, I have a TH 400 of 1967 and at some point no longer enters the secod and third gears, first gear and the back work fine.
Oil is ok and the new
all internal components are new
everything worked fine.
Can you help me?
thanks!!!!
I have a problem with the transmission, I have a TH 400 of 1967 and at some point no longer enters the secod and third gears, first gear and the back work fine.
Oil is ok and the new
all internal components are new
everything worked fine.
Can you help me?
thanks!!!!
T.
#4
thanks guys
to get the parts I bought everything I have no problems in the U.S.A.
I'll try to do the tests that I recommend.
I was afraid it was the oil pump but the pressure is also powerful else and when I press the accelerator.
thanks and greetings from Italy.
to get the parts I bought everything I have no problems in the U.S.A.
I'll try to do the tests that I recommend.
I was afraid it was the oil pump but the pressure is also powerful else and when I press the accelerator.
thanks and greetings from Italy.
#5
I tried to pull air from the tube that connects modulator valve and then to blow but it seems blocked.
Today it was raining and I could not bring the Olds out of the garage, I did not want it dirty
Today it was raining and I could not bring the Olds out of the garage, I did not want it dirty
#8
If none of the above remedies the problem then you need to check your line pressures using a hydraulic high pressure gauge avaliable through a quality vendor. One of the first steps when troubleshooting a trans is checking its pressures. Think of a auto trans as nothing more than a hydraulic pump. If the pressures are not within spec somethings leaking/bypassing. This can be seals, the pump, the clutches, seprerator plates et al...Google surf and find that info or get a book or CD on TH400s. There is a ton of info on troubleshooting and modifying this venerable GM trans.
#10
If the vacuum modulator is not working the tranny will not get out of first. Had this happen when I changed a intake manifold and the guy who done the work did not reconnect the hose to the valve. good luck with it.
#11
I did everything the manual said, checked everything but the problem was still present.
I finally opened the governor and check it out!!
Luckily I had another change, and I recovered the piece
I finally opened the governor and check it out!!
Luckily I had another change, and I recovered the piece
#12
Wow! I never saw one eaten up like that before? Anyone have any idea of what caused this? maybe just fatigue from age? Anyway I hope this solves your problem. You need to change fluid and filter again too!
#13
in fact it is the only part that I left old.
fluid, which do you recommend?
I use Castrol TQ 3 is the best in Italy
Thread
Thread Starter
Forum
Replies
Last Post