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Discussion Starter #1
Hello.
Sorry for bad English.

I've just rebuilt C4 (from 68'Mustang 289, 1964-1968 parts inside) with ATP FM-23 rebuilt kit and TransGo 47-2 shift kit. It was my first AT rebuild.
By the way, ATP's front seal is wrong, I've replaced it with Federal Mogul.

Also I replaced front pump bushing, direct high drum because of some cracks on it's bushing, also installed new kevlar TCI and DuPont bands and new TCI flexplate with ARP bolts. Mercon-V fluid (no way to find Type F at my location).

As a result I have very hard shift info reverse when fluid is hot.
All shift in drive position is good as I believe.

I suspect that I've mixed tight torque for the bands (inch-pound and foot pound).
Also ATSG C4-C5 manual and TransGo manual contains different data.

ATGS manual:
front/intermediate band - screw 13.5Nm/10lb-ft, back for 4.5 turns
rear/reserse band - screw 13.5Nm/10lb-ft, back for 3 turns

TransGo manual:
front/intermediate band - screw 10-12 inch-pound, back for 1.5 turns
rear/reserse band - screw 10-12 inch-pound, back for 2 turns

What is the right way for bands?
My torque wrench is Pittsburgh 3/8 Drive Torque Wrench with torque range 5 to 80 ft. lbs.

P.S. Transmission swapped into 94'Mustang with 1987 Ford 302 converted into 4BBL.
 

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Try readjusting the bands , usually snugged up firm and back 1 to 1+1/4 for front and bit over 2 turns for rear . Is the idle speed high ?? Driveshaft, uni's + diff all ok ?
 

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Discussion Starter #3 (Edited)
Try readjusting the bands , usually snugged up firm and back 1 to 1+1/4 for front and bit over 2 turns for rear . Is the idle speed high ?? Driveshaft, uni's + diff all ok ?
Driveshaft, diff, U-joints are OK because there was AOD before, without any bumps and hard shifts.

Idle speed when P or N a little high, about 1000 rpm.
When R, D, 2, 1 idle is about 850-900 rpm.
This is minimal possible idle with my carb - Holley 700 CFM (I believe it's Avenger). Adjusted with AEM wideband.
I'm planning to replace it with stock Ford-Holley 4180 500 or 600 CFM.
 

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Discussion Starter #5
Stock torque converter ?? That high idle is likely the issue if so
Yes, TC is stock, 1964 or 1968 year made.
I'll check this by replacing big carb with stock Ford-Holley carb.
I hope idle will be lower.
Thanks.
 

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Discussion Starter #6
Yes, it was problem with high idle.
Now with Holley 4180 and with normal idle shifting into R and D is OK :bow:
 
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