Auto Transmission Problem: HELP

[stangman281v8]

Hey everyone:

The last few days that I have noticed my transmission acting up. When driving it normally the car usually shifts below 2k from 1st to 2nd. Now it is shifting after 3k then catches. When you jump on the gas for a moment, the car will start to take off, then the rpms will start to climb like the car is in neutral. There is no check engine lights, and any advice would be great. I need to check the linkage to maybe see if that is it? Some people said that it might be the filter. I am not sure and kind of freaking out.

 

[ShelbyGT]

hmm, usually thats a sign of slippage and will need mechanical attention but just to be sure, check the fluid level and if its low add some lucas trans oil or some other type trans aid oil. you may get lucky

good luck

 

[Chief Gilly]

How many miles and when has it been serviced (oil & filter change)?

 

[stangman281v8]

The car has 54k miles on it, and the transmission was serviced at about 41k miles.

 

[Chief Gilly]

The car has 54k miles on it, and the transmission was serviced at about 41k miles.

Shouldn't be a maintenance issue then. So you have a late shift point 1st to 2nd and slippage under heavier load. Low fluid level may explain both but I'm sure you checked that. I haven't worked on an automatic in a while, but I found this forum where this guy seems to have same problem as you, hope it helps.

4r70w problems

 

[FrostByte]

Get it to a good garage quick. Dont mess around w/ changing fluids except if it needs a flush. Sounds like its on its way out. That way my van trans started before it needed rebuild.
Good luck

 

[stangman281v8]

Thanks for the advice guys. After doing some research I am thinking it's the 1-2 accumulator. I'll keep you updated.

 

[stangman281v8]

Bump...Any one recomend a good place or a local mechanic that knows these transmissions? Don't really want to take it to a dealer.

 

[EHA Racing]

Northeastern Transparts in Hamburg (Buffalo). They are the best, hands down. I won't bring a transmission anywhere else.

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[stangman281v8]

Thanks for the tip. I finally had some free time tonight so I put the car up on the lift and changed out the 1-2 accumulator springs and pistons in the tranny along with a new filter and fluid. It didn't really help. So next I am going to datalog the car and see whats up. Thank god for this being my every day car

 

[stangman281v8]

Update, the clutches for second gear got burned up. I had the trans rebuilt with better parts, new valve body, new tc and the jmod.

 

[ROUSH 4]

Glad its fixed,enjoy the mustang.