FAQ |
Members List |
Social Groups |
Calendar |
Search |
Today's Posts |
|
#1
|
||||
|
||||
Need some Turbo 400 transmission help
The car is a 74 Grandville. It seems sloppy going into gear and when you hit the gas it seems slip just a tad. The other symptom is when I was driving it earlier it seems to take while going into 3rd gear and when you let off the gas at like 50 and get back on it... again just a slight slip. The trans fluid and filter has been in there probably 30 years. So heres what I did, I obviously checked the fluid not a bright perfect red red but OK and it does not smell burnt. Checked vacuum hoses at the trans and carb, at the carb is 4 years old and fine, on the trans connected and no rips or tears. I also had the old lady in the car and the column shifter jiggles a bit and you can move at the trans too. The column rod jiggles at the trans too. Maybe a simple adjustment of this? Its rusted where the rod goes through the horizontal rod to the trans and subframe so I kroiled the crap out of it. Anyone else have any ideas? Thank you!
__________________
" Is wearing a helmet illegal" Mike Kerr 1-29-09 |
#2
|
||||
|
||||
Replace the filter, top off the fluid, see any diff.
Also be sure the HP is good so a weak engine isn't the issue. Set Total ADV to 34* (vac adv hose off during that) around 2500 rpm. |
#3
|
||||
|
||||
OK! I'll change it this weekend. Does the fluid actually lose its uummmpphh?
__________________
" Is wearing a helmet illegal" Mike Kerr 1-29-09 |
#4
|
|||
|
|||
Quote:
need to exchange out as much as possible, not just a pan drain & fill like when you change the filter. i do a fluid exchange buy unhooking the return cooling line at the radiator, start the engine with the end of the hose in a bucket and let the running engine pump out about 2 qts, shut off engine & refill with 2 new qts then repeat until you either see new red fluid coming out or youve done about what the system holds. i cant say if fluid looses its "uumph" but it can definitely wear out, most vehicles call for a trans fluid change at some interval, modern cars are usually around 60-80k, even with the modern so called "lifetime" ATF. if new fluid doesnt help, its time for a rebuild or new trans. |
The Following 2 Users Say Thank You to 78w72 For This Useful Post: | ||
#5
|
||||
|
||||
Not really. I ran the 1/4 mile in a car i bought with a fully cooked TH400, and it shifted firmly. Some clutch packs were fried to the metal. Probably had a low-fluid situation before me.
|
#6
|
||||
|
||||
When you drop the pan, see what debris is there. It sounds like overhaul time to me.
__________________
The difference between inlaws and outlaws? Outlaws are wanted |
#7
|
||||
|
||||
At a minimum the direct clutch pack is going South on you.
Since it's been at least 30 years since it's had any attention simply time for a rebuild, so I'd start there. Dropping pans and pissing with snake oil is just prolonging the agony........IMHO........
__________________
If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
#8
|
|||
|
|||
type f is definitely not "snake oil"... firmed up my 3rd gear shift very good & kept the car on the road for many years as a broke teenager & into my mid 20's. that car saw more abuse than most on here & the trans kept up with it for longer than it should have.
i agree if its going bad a rebuild is ultimately needed, but for many transmissions depending on how bad the shifts are it can prolong the life for quite awhile to get you by until a rebuild can be done. |
#9
|
||||
|
||||
It is a hard decision to rebuild the trans in this car. I bought the car for $2500 5 years ago and its a daily driver and very rusty at this point. But then again I do love it. Itll cost $2000 to rebuild probably. If type F works I'll try it.
__________________
" Is wearing a helmet illegal" Mike Kerr 1-29-09 |
#10
|
|||
|
|||
Quote:
i can't guarantee the type F will fix your issue but based on what ive read & heard for decades as well as my personal experience it should definitely help a slightly mushy shift to buy you some time or possibly last a very long time, if the clutches are totally shot then fluid probably wont help. just be sure you replace as much as possible, not just 2-3 qts from a pan drain & fill. the exchange process i mentioned works good & wont cause any damage if done 2 qts at a time. good luck! |
The Following User Says Thank You to 78w72 For This Useful Post: | ||
#11
|
||||
|
||||
Quote:
__________________
" Is wearing a helmet illegal" Mike Kerr 1-29-09 |
The Following User Says Thank You to 4dblnkldude For This Useful Post: | ||
#12
|
||||
|
||||
Well... it worked! I don't think the pan was ever off this transmission. I got about almost 2 gallons out. I put in 7.5 qts of type F and sent it. it now shifts fine, the car only has 80k on it so I think it was never changed since 1974!!
__________________
" Is wearing a helmet illegal" Mike Kerr 1-29-09 |
The Following User Says Thank You to 4dblnkldude For This Useful Post: | ||
#13
|
||||
|
||||
Plan to change the filter to be a metal screen filter in about 300 miles. You will thank me later.
|
Reply |
|
|