hard 1-2 shift cold, much softer when warm

[JimP]

Hi guys,

today I installed some new drag radials, I went up from a 275/50/15 to a 275/60/15. I was out cruising around for a couple of hours. I notice that when my car is cold, the 1-2 shift is very firm and fast. After several passes on a back road, my 1-2 shift has softened up, and also feels as if it takes longer, my 2-3 shift is still very firm and fast. My trans is rebuilt, with the following parts, Alto Red's, Alto Red extra wide band, CK billet forward drum, kolene's, super servo, I use type F fluid and have a trans cooler, converter is a 10 inch PATS, 3200 stall, other mods in Sig.

The best way to describe is the 1-2 shift it just soft and prolonged after car gets hot. Shift kit is a Trans GO but I do have a CK kit new in the box(to be installed) . Trans was rebuilt less than 3,500 km ago. I have not played with the TV cable and have since parked the car. Could there by anything wrong, I don't remember 1-2 shift being this way, it has always gotten a bit softer once warm but this feels very different, feels like it's sliding into second.

Any advice is much appreciated as I wait for the local GN guru to free up some time to take it for a spin.

 

[SSedan64]

Hook a Pressure gauge up to it & see if it's lower when Hot. May be a Pump or Seal problem.

 

[JimP]

Broken band anchor. I hope this was a fluke. Any way since it's being rebuilt again, I'll be adding a few more billet parts and finally get CK's calibration kit put in, seeing as I've had it sitting new in the box collecting dust for a cpl of years. Any must do's you gurus could think of to help this thing live.

I'm of the belief "Since it's out", or "while your at it"

Jim

 

[SSedan64]

Yeah, a 300M Band Anchor. :biggrin:
May want to check with Chris about the older Recalibration Kit as He's updated it several times.

 

[JimP]

Any ideas as to why the ban anchor failed? Is there an improved piece? As for CK Kit, I have the latest version, the one where Chris stamped his own plates. The rest of the trans looks mint, all frictions, steeles etc....

Jim

 

[SSedan64]

Yes, Chris has upgraded Band anchor Pins that go in the Trans case made out of 300M steel.
When a Shift kit or larger Servo is installed it puts more pressure on stock parts and they can & do fail.

Alto has 2 different styles of reinforced Bands in the Servo anchor area, old wedge type & thicker style. Not sure which is better style.
http://www.altousa.com/images/uploads/AltoHighPerformanceCatalog.pdf