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Thread: Trans leak....

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    VCVC Member garagedoordennis's Avatar
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    Trans leak....

    I'm having a issue with the tail shaft leaking on my 200r4. I have changed the seal twice and polished the input shaft 2nd time, but again it's leaking.
    My next thought was changing the the input shaft on the end of my driveshaft....anyone have a spare 1st Gen one ?
    Changing the seal again with a different input shaft I hope will solve this.
    1968 Chevy 90 250/700r/Fuel Injected - sold and missed
    1966 Chevy handyvan 350/auto (work in progress)
    1965 GMC 350/auto ( just had to have )

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    VCVC Member jrinaman's Avatar
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    Quote Originally Posted by garagedoordennis View Post
    I'm having a issue with the tail shaft leaking on my 200r4. I have changed the seal twice and polished the input shaft 2nd time, but again it's leaking.
    My next thought was changing the the input shaft on the end of my driveshaft....anyone have a spare 1st Gen one ?
    Changing the seal again with a different input shaft I hope will solve this.
    does the yoke go in enough? if not, it can wobble and destroy the seal. if it were me, I would buy new and get the longest one. you can always cut off a little if needed. https://www.summitracing.com/parts/axe-t350wa?rrec=true or longer for less money https://www.summitracing.com/parts/a...0-hp?rrec=true
    '64 chevy, 292 40 over, 206/526 cam, 2004r trans. 9.75:1, dual webbers, Langdon cast headers, 1.94 valves

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    VCVC Member garagedoordennis's Avatar
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    good point..I ordered the longer one this morning with a new seal. Thanks for the reply !
    1968 Chevy 90 250/700r/Fuel Injected - sold and missed
    1966 Chevy handyvan 350/auto (work in progress)
    1965 GMC 350/auto ( just had to have )

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    VCVC Member jrinaman's Avatar
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    Quote Originally Posted by garagedoordennis View Post
    good point..I ordered the longer one this morning with a new seal. Thanks for the reply !
    before taking it apart, check how much is exposed on the current yoke. slide the new one in that far plus an inch to insure it doesn't bottom out. it probably wont but certainly worth checking.
    '64 chevy, 292 40 over, 206/526 cam, 2004r trans. 9.75:1, dual webbers, Langdon cast headers, 1.94 valves

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    VCVC Member garagedoordennis's Avatar
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    I did some measuring tonight and I have 2 3/4" exposed shaft on the yoke. I think you are correct here with the shaft not being in far enough
    1968 Chevy 90 250/700r/Fuel Injected - sold and missed
    1966 Chevy handyvan 350/auto (work in progress)
    1965 GMC 350/auto ( just had to have )

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    VCVC Member jrinaman's Avatar
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    Quote Originally Posted by garagedoordennis View Post
    I did some measuring tonight and I have 2 3/4" exposed shaft on the yoke. I think you are correct here with the shaft not being in far enough
    I am certain that is your issue! sounds like your shaft is too short, this is an easy fix I have done several times. actually have a new/never used one that I bought for mine but ended up sliding everything back for multiple other reasons.
    '64 chevy, 292 40 over, 206/526 cam, 2004r trans. 9.75:1, dual webbers, Langdon cast headers, 1.94 valves

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    VCVC Member garagedoordennis's Avatar
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    So i removed the driveshaft and the overall length is 3.5....yikes! I was able to slide this all the way in and did not bottom out. Waiting for new yoke
    1968 Chevy 90 250/700r/Fuel Injected - sold and missed
    1966 Chevy handyvan 350/auto (work in progress)
    1965 GMC 350/auto ( just had to have )

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    VCVC Member garagedoordennis's Avatar
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    After doing some math the new longer yoke will give me 3/4" more insertion . ..I think I need at least another 1". Looks like I'm going to need a longer driveshaft
    1968 Chevy 90 250/700r/Fuel Injected - sold and missed
    1966 Chevy handyvan 350/auto (work in progress)
    1965 GMC 350/auto ( just had to have )

  9. #9
    VCVC Member jrinaman's Avatar
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    Quote Originally Posted by garagedoordennis View Post
    After doing some math the new longer yoke will give me 3/4" more insertion . ..I think I need at least another 1". Looks like I'm going to need a longer driveshaft
    how long is the shaft? there has been discussion on another thread about first vs. second length. either way, the new longer yoke is 6 1/8" long so should be plenty. or try this one, it is 8 3/4":
    Transmission Yoke, Steel, 8.750 in. Length, 27-Spline, TH350, 200-4R, 4L60, 700R4, Muncie, Powerglide, Brinn , https://www.summitracing.com/parts/axe-xlt8?rrec=true
    Last edited by jrinaman; 08-28-2019 at 10:37 AM.
    '64 chevy, 292 40 over, 206/526 cam, 2004r trans. 9.75:1, dual webbers, Langdon cast headers, 1.94 valves

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    VCVC Member jrinaman's Avatar
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    Transmission Yoke, Steel, 8.750 in. Length, 27-Spline, TH350, 200-4R, 4L60, 700R4, Muncie, Powerglide, Brinn




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    Transmission Yoke, Steel, 8.750 in. Length, 27-Spline, TH350, 200-4R, 4L60, 700R4, Muncie, Powerglide, Brinn
    Last edited by jrinaman; 08-28-2019 at 10:35 AM.
    '64 chevy, 292 40 over, 206/526 cam, 2004r trans. 9.75:1, dual webbers, Langdon cast headers, 1.94 valves

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