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F apply or FF apply lever?

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F apply or FF apply lever? Empty F apply or FF apply lever?

Post  HorsinAround February 26th 2016, 12:02 pm

I am gathering parts to put a spare transmission together and the local tranny repair shop that also builds racing tranny's recommended the FF apply lever, but I think Frank recommends the F apply. What is the difference and which would be better for a drag only tranny?
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Post  whitefield February 26th 2016, 6:32 pm

A = 1.65:1
B = 1.73:1
D = 1.97:1
E = 1.85:1
H = 2.18:1
F = 2.30:1
FF = 2.82:1

The higher the number the more clamping force is applied to the band but also has a slower apply action .if memory serves me right .

E lever is what you want
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Post  Gregaust February 27th 2016, 2:54 am

Frank Uses the E lever with the R servo . My understanding is those F and FF are only to be used with stock smallish servos .
Used with an R servo can apply a lot of force and possibly crack the main case

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Post  airford1 February 29th 2016, 2:42 pm

R servo with an E lever and too much pressure will crack the case to.
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Post  Frank Merkl February 29th 2016, 7:56 pm

never cracked a case with an R servo & a D or a E lever , all the cobra jet trans had an R servo and an E lever
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Post  airford1 March 1st 2016, 12:50 pm

Pressure was at 220 all forward gears. The valve body was a Dynamic transmission reverse pattern brake. R servo with an "E" leverF apply or FF apply lever? 12185234_537847743046090_6798420514583404403_o
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Post  airford1 March 1st 2016, 12:53 pm

F apply or FF apply lever? Dscn2151
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Post  airford1 March 2nd 2016, 4:19 am

Posted pictures, but there gone now . Oh well doesn't really matter.
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Post  HorsinAround March 2nd 2016, 2:12 pm

very glad I asked before starting the build... what lever comes from the factory?
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Post  airford1 March 2nd 2016, 2:18 pm

Note that my problem was Excessive pressure which caused the case to crack. As stated the R servo and "E" lever is the performance package. The case will be fine provided the pressure is is in the proper range.
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Post  Gregaust March 3rd 2016, 5:19 am

HorsinAround wrote:very glad I asked before starting the build... what lever comes from the factory?

There is several different ones , A is fairly common .

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Post  Gregaust March 3rd 2016, 5:21 am

Airford , there was a local guy here that also cracked a case the same as your pics . I believe he had a transgo manual conversion valvebody but not sure what the servo and lever was

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Post  HorsinAround March 3rd 2016, 11:09 am

Thanks guys, I had ordered a tbrake valve body and F lever from Broader, so I called and asked him to change it to an E lever.
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Post  XEngr March 10th 2016, 8:32 pm

I used to have an FE C6 case that came from one of Holbrook's old race cars. They had pre-welded those area's where the case may crack.

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Post  Gregaust March 11th 2016, 5:17 am

The thick cast Aluminium pans can help stiffen the case as well

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Post  Frank Merkl March 11th 2016, 2:55 pm

That's the trick!
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Post  XEngr March 11th 2016, 6:47 pm

The FE case with the welds also had a thick deep sump aluminum pan.

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