Fresh 904 skipping 2nd gear

jeepthrills01

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First Tqflite rebuild in 30 years.
I got a good kit with alto frictions and kyolene steels. All new seals, all measurements fell within spec.

There was already a proven TF-2 kit in the valvebody which remained intact.

I added a CRT multi spring to the front as the big anti wound coil was weak. Also added new rear and middle aluminum servos. Front band apply servo was left alone.

First drive attempt first gear wound up to about 3k...and straight to 3rd. Only went a couple miles....different throttle positions were tried...no change.

I turned around and got about a block from the house (fully warmed up now) and got 1-2, and 2-3 shifts pulling away from the light. I went another block and it wouldnt do it again.

I readjusted the front band...same result.

Next attempt I only backed off 1 turn from 78 inlbs. Nope.

Left it at 78 inlbs...seems better..but will wear front band quickly.

Thinking I should take a few springs out of the CRT unit.

Thoughts?

And many thanks.
 

dvw

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Did you air check the front servo? There is no way I can see the forward clutch spring is inhibiting 2nd gear. Theat clutch applies in 3rd gear. You have a front band apply issue. If it air checks I'd be looking at the valve body.
Doug
 

493 Mike

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Pressure testing would help with your diagnoses. What condition is the KD linkage in? Adjustment?
Mike
 

jeepthrills01

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Its a cable....i have tried slightly loose, and just barely no slack.
Was planning today to try it slightly tensioned.
 

jeepthrills01

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I think I found the issue.

The second gear servo pin was stuck in the out position...and appears slightly bent.

Guess I need a servo. The 727 servo is the same one right? I have a 727 core to pull from...or I could spend more money on a
Sonnax 7722830.
 

493 Mike

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I think I found the issue.

The second gear servo pin was stuck in the out position...and appears slightly bent.

Guess I need a servo. The 727 servo is the same one right? I have a 727 core to pull from...or I could spend more money on a
Sonnax 7722830.
No. The 904 is smaller.
Mike
 

jeepthrills01

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Little more research on my part shows that sonnax number is for a 727.
Does anyone know if they make one for a 904? Or have a spare 904 servo?
 
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