TKO 600 + Quick Time BH Space?

[mikeforte]

Hi,
I read your post and have a few questions;
What engine do you have?
What bellhousing part number do you have?
If you have a BBF, you may need a short input kit depending on the bellhousing you have.
Did you use the correct clutch alignment tool with the correct size pilot?
I stock all the parts you have or need and know these for fitment.
Call me at wk 508 875 0016 and we can go over those questions to figure this out.

[lovehamr]

Thanks for the responses guys,
Mike;

Originally Posted by mikeforte

Hi,
I read your post and have a few questions;
What engine do you have?

66 428 FE block

Originally Posted by mikeforte

What bellhousing part number do you have?

Don't know right now, I'd have to run back home to get it.

Originally Posted by mikeforte

If you have a BBF, you may need a short input kit depending on the bellhousing you have.

If this were the case wouldn't the missmatch be much greater than a few thousandths?

Originally Posted by mikeforte

Did you use the correct clutch alignment tool with the correct size pilot?.

No clutch in it at the time, just the BH w/block plate and pilot bearing. Still have to center up the BH and didn't want to put the clutch in and have to take it right back out.

Originally Posted by mikeforte

I stock all the parts you have or need and know these for fitment.
Call me at wk 508 875 0016 and we can go over those questions to figure this out.

Just tried and a nice lady informed me that you guys don't open until 10:00.

Steve

[Blittleton]

The difference in the two input shafts are 5/8 in. I would measure to see if the spacer you are using with the bellhousing is that. Other wise I would buy an short input shaft from either Forte's or DD Performance. Throw out the spacer. And see what you come up with.

Bill

[kitcarbp]

Steve, the big block short input shaft for either the top loaders or the TREMECs are way shorter and obvious when measured compared to small block input shafts. Your issue sounds like something else.
Couple of basic things to start with.
Is there a machinging burr or step inside the pilot hole preventing the pilot bearing from seating all the way ?
The pilot bearing you are using, is it the solid type or are you using a more modern needle bearing type?
Have you compared your pilot bearing to others made for 428 FE's to make sure pilot the bearing is not mis-machined ?
Do you have the correct QT block plate thickness for the QT bell housing you are using? Speak to whoever sold you the QT BH to confirm this.
As an example (not FE) , my OEM block plate on a BB Ford (385 series motor)OEM bell housing is 0.070 inch thick, giving me a total distance from engine flange to BH trans face flange of 0.070+ 6.250 = 6.320" . I am using a TKO 600 with the short input shaft kit installed.

I am not familiar with FE crank pilot hole dimensions (others need to confirm).
1) Do 428 FE auto trans cranks and 428 FE manual trans cranks have different pilot hole dimensions (depth wise) that could be causing this?
3) Is it an aftermarket crank whereby the pilot hole may not be machined deep enough (to print)? In any case it sounds like you desire your pilot bearing to either sit a little deeper into the crank pliot hole, or you want a pilot bearing that is a little thinner to avoid the interference. If its the solid type I have heard of folks machining the thickness it to fit the crank pilot hole, but this is usually only required when doing engine/trans conversions from different manufacturers. I would avoid the spacer if you can and see if you can get the pilot bearing to seat further into the pilot hole.

EDIT
I just checked the QT website for both FE part numbers (RM-6056 and RM-6057) and both are listed as total height of 7.050" and the QT motor plates are listed as 0.125" thick, this would give you 7.175" with plate to the rear face of BH. You stated you measured "7.11" on the TKO face to input end. So I would bet it must be the pilot hole in crank, pilot bearing or its installation into said hole.

For ref here are the TREMEC specs, it shows 7.21 from trans face to input end on std (long) input shaft.


good luck

[mikeforte]

Hi Steve,
I'm sorry I missed your call today. Try my cell @ 781 248 8946 until 10:30 est tonight or anytime this weekend.