|
|
|
#1
|
||||
|
||||
722.3 Transmission Issues
SO this is the car that I've done the engine swap in. The car has a rebuilt 722.3 automatic transmission. Two days ago I replaced the shift modulator with a brand new "upgraded" unit. Now, it shifts very well through the forward gears. It goes into Drive and Reverse with authority and without hesitation. The problem is when going over hills... (this issue is kind of hard to explain). When you crest a hill going around 25MPH and you're not hitting the throttle, the transmission will shift either up or down depending. Now, here's where the issue lies. Whenever you resume acceleration, the engine will rev up before catching and/or dropping back into gear. It's almost like the transmission sits between 3 and 4 in neutral and when you hit the throttle it shifts one way or the other back into a forward gear. The transmission has the proper amount of fluid (Valvoline max life) and when I put the car back together, I changed out the filter as well. ANY IDEAS??
__________________
'83 300D Turbo Diesel & '84 300D Turbo Diesel |
#2
|
|||
|
|||
When it finally shifts into fourth gear is that a hard shift?
I have a similar problem going into fourth if at a neutral throttle. Smooth if throttle is applied.
__________________
1984 300SD turbo 126 "My true love" God made me an atheist and who am I to question His wisdom |
#3
|
||||
|
||||
Mine is really strange. It's when you're coasting and (in theory) it downshifts to 3rd gear. well, once the throttle is re-applied, it slams into 3rd like it's coming from neutral. Shifting between all other gears is fine on normal acceleration.
__________________
'83 300D Turbo Diesel & '84 300D Turbo Diesel |
#4
|
||||
|
||||
Quote:
I can't answer your specific qutestion but the modulator can be adjusted and the same with the bodwen cable. There is also 2 places to check the the pressure (during the modulator adjustment?). Also you have an Vacuum Valve adjustment on the Fuel Injection Pump.
__________________
84 300D, 82 Volvo 244Gl Diesel |
#5
|
||||
|
||||
Quote:
These transmissions don't like other stuff
__________________
1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#6
|
||||
|
||||
Quote:
__________________
'83 300D Turbo Diesel & '84 300D Turbo Diesel |
#7
|
||||
|
||||
The Maxlife ATF is a full synthetic "general purpose." It came highly recommended from a buddy who works on these cars quite often and even drives one every day. Honestly, it helped a LOT with going into gear from neutral. Before, I was running standard Dex III (I believe) and it shifted really hard into reverse and now it's considerably smoother. However, even with the old fluid, it had the same issue I came here about initially. The old modulator was also cranked up to compensate (for what I imagine is an out of adjustment vac system).
__________________
'83 300D Turbo Diesel & '84 300D Turbo Diesel |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|