Another Powerglide Question

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Jul 28, 2006 | 01:08 AM

66rag427

Thread Starter

Racer

Joined: Nov 2003

Posts: 336

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From: dayton oh

Another Powerglide Question

My 66 powerglide (behind a BB 390 hp if that matters) performs perfectly until it gets hot. Engine temp 180 +. At this point on the downshift it will not go to first but lands in nuetral. My idle speed is 550 rpm.

When I press the pedal to accelerate it will spin in nuetral for a fraction of a second catch first and lurch into gear. I have learned to manage it.

I took it to a repair shop (P G drag race guy). He says he rebuilt it. I have had it back three times and still have the problem. On the third trip I watched him repace the valve body and the sort of round triangular thing on the right. Not the modulator. He has pretty much given up (not in when I call).

Any suggestions...............Help. Thanks in advance.

Jul 28, 2006 | 02:38 AM

knight37128

Le Mans Master

Joined: Feb 2006

Posts: 6,048

Likes: 5

From: "cutesy" TN

What do the clutches look like? Color of fluid? Does it shift hard into second? Any slippage there?

You may need to borrow a torque converter. Just to eliminate it.

Jul 28, 2006 | 10:57 AM

1955 copper

Safety Car

Joined: Jul 2006

Posts: 4,606

Likes: 210

From: Nevada City Ca.

2015 C1 of Year

Filter gasket may be drawing air (check filter) "Or band adjustment not correct",or clutch pack piston seal leaking or torn

Jul 28, 2006 | 11:05 AM

kenEDMUNDS

Burning Brakes

Joined: May 2003

Posts: 990

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From: DAVIE/FORT LAUDERDALE FL

Is your car an original 390 powerglide? Mine is also. Yours is the fourth I have heard of. What options do you have?

Jul 29, 2006 | 11:25 PM

66rag427

Thread Starter

Racer

Joined: Nov 2003

Posts: 336

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From: dayton oh

Quote:

Originally Posted by knight37128

What do the clutches look like? Color of fluid? Does it shift hard into second? Any slippage there?

You may need to borrow a torque converter. Just to eliminate it.

I did not see the clutches but the tranny guy swears he completeky rebuilt it. The fluid is new and bright red and it doesn't shift hard into second. I would call it firm though. Thanks

Jul 29, 2006 | 11:26 PM

66rag427

Thread Starter

Racer

Joined: Nov 2003

Posts: 336

Likes: 0

From: dayton oh

Quote:

Originally Posted by 1955 copper

Filter gasket may be drawing air (check filter) "Or band adjustment not correct",or clutch pack piston seal leaking or torn

Where would these seals be? Thanks

Jul 29, 2006 | 11:41 PM

66rag427

Thread Starter

Racer

Joined: Nov 2003

Posts: 336

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From: dayton oh

Quote:

Originally Posted by kenEDMUNDS

Is your car an original 390 powerglide? Mine is also. Yours is the fourth I have heard of. What options do you have?

Ken, Yes mine is an original BB powerglide. I guess we are in a very small club huh? If you click on my corvette pictures here there are some pics. As far as options I think the only one I don't have is C 60 A/C. Even has factory shoulder belts, but I don't use them. Including yours I have only seen a blue coupe, a blue conv, and your yellow coupe. I saw a silver one on ebay last week but it looked very fake to me. Lot of wrong parts, poorly restamped pad. Maybe just a bad resto. What state are you in? I am in Ohio. Thanks