[hopscotch]

I have just bough a 97 mustang and when it shifts from 1st to 2nd it slams together really hard. I really need to know if it is suppose to do this, and if so what makes it do this. It is an automatic.

[stlwagon]

Welcome aboard... Have you checked the fluid levels?

[racin366]

Check the fluid level, make sure its not too high or low (high is just as bad as low, sometimes worse, it doesn't smell burnt, and looks the right color. A fluid change may be a good idea as well. Check that and post up the results, we can go from there if it doesn't solve the problem.

[hopscotch]

thanks the fluid was a little to high

[Bullitt5339]

If it still does it after getting the fluid to the proper level, the lower 1-2 accumulator spring could be broken. It's a common problem in 4R70Ws, but the good news is that in the J-Mod, you don't even use the 1-2 lower spring to firm up the shifts.

[JC316]

Originally Posted by Bullitt5339

If it still does it after getting the fluid to the proper level, the lower 1-2 accumulator spring could be broken. It's a common problem in 4R70Ws, but the good news is that in the J-Mod, you don't even use the 1-2 lower spring to firm up the shifts.

+1. Happens to the 4R70w. I think they fixed it in 98, but the 97 should still have the issue.