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Seperator plate repair kit warning!!

 
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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Tue Sep 09, 2014 9:34 pm    Post subject: Seperator plate repair kit warning!! Reply with quote

Freshened up the 200-4R I ran a few years back to run behind the 383 I also freshened / changed to a N/A setup. Put in a new forward clutch, direct clutch, and all seals and bushings. Seperator plate had minor wear around a few holes so I wanted to replace it too. My local parts house used to be Cadco but were bought out by Transtar and they don't seem to have quite the individual parts inventory as Cadco. They didn't have a plate but had a repair kit that they said everyone is using. You drill out the existing hole to 1/4" and this hardened seat goes through and is held in place with a snap ring. I had some pretty horrific carburetor issues I had to work through - guy gave me a carburetor he never used and it took me a while to get it working decent. 1 - 2 shift was very soon and hard, 2 - 3 was a slipping mess at part throttle. Full throttle shifts were very soft but it did shift. Checked line pressure and it was low everywhere. TV wasn't in play in low and reverse so I figured something pump related since I didn't take it apart. Side clearances were a little wide so I fixed that but didn't have that warm fuzzy feeling that was it. It cooked the band and high gear so more new parts. Looked around and finally found that one of the pockets in the valve body wasn't deep enough for the ball plus the head of the repair seat and it clamped the ball when installed. I don't think it would work with a stock diameter ball but for some reason Transgo installed a slightly larger ball in this location that compounds the problem. All I did is remove the repair seat as the larger ball fit the drilled hole fine. This solved the issue and all shift are back to being crisp. This issue might only be specific to the 200-4R transmission but wanted to let everybody know to make sure there is enough depth for the check balls to float if you use the seat repair kit. I actually like the idea of the seat it just bit me but now I know what to look for. Here is a picture of the seats and the valve body. The middle "C" is the problem child. Clay




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SMOKEmUP
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Joined: 30 May 2002
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1979 Chevrolet Camaro

PostPosted: Wed Sep 10, 2014 8:57 am    Post subject: Reply with quote

Good info, glad you're able to figure out the problem.
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10sec.et
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Joined: 29 Mar 2006
Posts: 3473
Location: Houston,Texas
346658.74 points


1969 Oldsmobile Cutlass

PostPosted: Sat Sep 13, 2014 12:35 am    Post subject: Reply with quote

no way I would have the patience for that. im lazy when it comes to transmissions. tuning with the laptop is as far as I want to go. im dreading building my 4l60.
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It seems we can look at our magical Balls and come up with a fix?

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Joined: 30 May 2002
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1979 Chevrolet Camaro

PostPosted: Sat Sep 13, 2014 2:47 am    Post subject: Reply with quote

10sec.et wrote:
no way I would have the patience for that. im lazy when it comes to transmissions. tuning with the laptop is as far as I want to go. im dreading building my 4l60.

Right there with you on that one. I need to rebuild the 4l60 on my Z.

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squeeezer
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Joined: 02 Mar 2007
Posts: 2427
Location: new richmond WI
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1991 Chevrolet Camaro

PostPosted: Mon Sep 29, 2014 12:08 am    Post subject: Reply with quote

I know way too many trans builders to even go there
How many people know builders that are good and chea......affordable

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