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  #1  
Old 10-24-2005, 11:11 AM
JamesDean's Avatar
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Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
vacuum leak, tranny flaring..part 2

hey sorry for the new thread but my old one had been deleted, dont know why. the links in my emails goto a thread in the Parts section.

Backstory:
I had a vacuum leak at the bleed-off valve on the IP. I replaced the bleed-off valve, vaccuum is 15" at the tranny port. The modulator holds 23" for better than 5minutes.

Changed the tranny fluid with Mobil 1 Synth and added some stop-leak (I have a front seal leak) The pan gasget and tranny filter was also changed.

1-2 shift is good
2-3 shift has terrible flaring. Anywhere between 500rpm and 2000rpms.
3-4 is fine.

I have no adjusted the modulator since the fluid change, but, before I changed it I adjusted it 5 notches clockwise.

Did I adjust the wrong way? Is my modulator shot (its the Original and the car is an 82-300SD)


Thanks Guys,

Kris
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  #2  
Old 10-24-2005, 11:40 AM
rg2098's Avatar
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Location: Rochester Hills, MI
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I can't remember which way to adjust it, but if it holds vac then the modulator is good.
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  #3  
Old 10-24-2005, 12:19 PM
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Location: USA
Posts: 1,404
Sounds like a K1 spring issue? Do a search for it. I sure would like to see a DIY guide on that (whoever does it first).
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  #4  
Old 10-24-2005, 01:10 PM
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Join Date: Apr 2004
Location: Denver, CO
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Definitely sounds like a K1 spring issue. My transmission is doing a similar thing, but it's not that bad. I spent this weekend adjusting the throttle linkage, the bowden cable and verifying the vacuum. I've been slowly getting the fluid up to the right level, and after adding a pint of Trans-X, I may only have one more pint of fluid to get it to the dipstick marks. My shifts are quite firm except for the 2-3, so that points to the K1 spring. Search in the archives for that spring kit, I've not got the number handy.
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  #5  
Old 10-24-2005, 02:08 PM
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Location: RI shore
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No harm in trying the K1 kit, it's quite inexpensive. However, neither that kit, Mobil 1, trans-x, new modulator or finally rebuilt valve body was able to help old Blue shift properly. I removed and rebuilt the trans this summer. One of the K1 discs was almost completely absent of friction material. The B3 plates were evenly but nearly all worn out. Clutch pack seals were rock hard, teflon seals had significant metallic impregnation, brake bands loose, front pump bushing shot (of course, that's why your front seal leaks too), etc.etc.

On the upside, because I used 2 transmissions and stopped running this one before it self destructed, I reused the valve body and torque converter and spent about $300 total in rebuilding it. It was really a lot of fun, since I could just drive my old pickup while I took my time. Good luck!
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  #6  
Old 10-24-2005, 02:47 PM
JamesDean's Avatar
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Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
thanks guys, can anyone point me in the direction of this K1 spring kit? Perhaps some pointers or anything like that...thankx....nowi have to drain the tranny and waste all that $80 of Synth..


kris
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