Quote:
Originally Posted by zach_carver
The truck has the factory dipstick and pan. The trans came from GM and was supposed to of been empty of fluid. However I started removing plugs from it and fluid come pouring out. Before starting up I pulled the stick and it showed over full on stick in bright red fluid. We started the truck while checking fluid we added 4 qts of fluid. Checked multiple times and was perfect in hot when it had been driven some. But let me add this, when the trans is 180 to 190 degrees it shows maybe .5qt over full above HOT on the stick. I noticed today when truck started acting up it was 199 degrees and I was pulling out of parking lot nice and easy. It was the 1-2 shift that flared/slipped. Before hand the 1-2 shifts had gotten very firm. Only the 1-2 shift. All others were fine. How do you adjust pressures?
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You bought your engine & trans package from a Salvage yard.....Correct? And the Dipstick & Tube are also from the same Salvage yard?? You have too watch these things! NEVER assume you got a matching Stick & Tube, They could have broke the Stick pulling the engine & installed a Longer Stick.
GM ships their NEW automatics dry (Maybe a quart will be in there from assembly), The Converter that come with them is Remanufactured & is also Dry. Yours having 8-9 Quarts means 1 of 2 things.....The Trans was ran on a Dyno OR You got sold a USED unit that was a return.
GM Dynoing their units would be news to me!
I'm guessing the Converter was already installed? (It would about had to have been for 4 quarts to bring the unit to proper level)
1-2 Flare..... A Flare, Cut-loose, Neutralization is a sudden rise/jump in RPM during a ratio change. A 1-2 Flare is unlikely....
In 1st gear...With the shifter in D4, The Forward Clutch, Forward Sprag, & Lo-Roller Clutch are Holding.
The ONLY thing that needs to happen for the Ratio change too 2nd is the 2-4 Band applies & holds the reverse input drum, sunshell, & reaction sungear stationary.
Even if the 2-4 band does not hold/Slow apply....The trans will just stay in 1st, No wild jump in RPM......Unless the Forwards cut-loose, Again....Highly unlikely! I can stack a bunch of steels in the Forward Clutch with minimum pressure & they would hold.
If you just have a Loooong Slow-Slipping 1-2....Well, If the Band cant stop the Drum, That puts us right back to Pressure Rise & Fluid Level.
2-3 Flares/Cutloose/Neutralization are VERY common even with good Pressure Rise & Fluid Level. The Band has to release & the 3-4 Clutches have to come on in Perfect Timing.
Band release too early/3-4's come on too late & you get a Flare....Back to 1st gear ratio because the only Friction holding is the Forwards.
Band comes off slow, Or the 3-4's come on too early, You get a Tie-up.....Or more technically....It goes into 4th between 2nd & 3rd.
2-3 Flare & Tie-up are extremely hard on the 3-4 clutches.