Re: [Fwd: 4HP22 "double-shifting"]

davidtowle@lycosmail.com
Sat, 27 Jun 1998 00:29:07 -0400 (EDT)

My 87 505 turbo when new vibrated horrendously when it locked up at 51 mph till it got to 55. Was very unpleasant. Under warranty dealer installed a modification that increased the lockup speed to about 57 mph and all was fine.

Dave Towle

---- you wrote:
> I have a 1991 SW8 turbo with the 4HP22 automatic. The manual says it will
> up-shift at 51 mph. Actually, I think mine shifts a little before that.
> It is a pain to drive around town, so I lock it in 3d with the shift lever.
> My thinking is that this actually is better for the transmission than all
> of the up- and down-shifting. How do others manage this?
> Austin Hoover
>
>

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