John Wood Big Bore Transmission Dipstick Adapter

Part Number:
JWTBB

Manufacturer:

$98.55
$89.99
(You save $8.56 )
(15 reviews) Write a Review
John Wood Big Bore Transmission Dipstick Adapter

John Wood Big Bore Transmission Dipstick Adapter 1994.5-2010

The factory dipstick / oil fill tube on the early Ford HD transmissions (1994.5-2010 model years) are a press in type that depend on a Teflon coating to seal and keep the transmission fluid in. Often times the Teflon coating does not seal entirely and results in a fluid leak. John Wood has made this two piece tube that utilizes Viton o-ring seals that will insure a leak free life of the part. This product also allows for a simple removal that allows you to remove the lower part of the dipstick / oil fill tube from the transmission case while the transmission is in place. Replacing the factory tube requires removing the transmission, the repair tube does not require removing the transmission making the repair only a 20 minute replacement versus a 5 hour repair.

Whether you are removing your transmission or if you are trying to fix your leaking dipstick / oil fill tube, this  product will give you the peace of mind that your transmission has the best components possible.
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  • 1
    John wood t

    Posted by Connor Sanderson on Aug 27th 2026

    Absolutely terrible saw the great reviews thought give it a try mine was about a inch longer than stock could not get the dip stick tub to line up with the bolt had to end up cutting a little to make it work.

  • 5
    Dipstick adapter

    Posted by Steven on Aug 3rd 2026

    Install was very easy. Fixed my trans dipstick leak!

  • 5
    Good project

    Posted by Bill on Jan 19th 2026

    Installed easily and working great!

  • 5
    John Wood Big Bore Transmission dipstick adapter

    Posted by BISHOP BEVERLY on Jan 10th 2026

    Great customer service. Packaged very well. Arrived as advertised. Very easy install. No leaks

  • 5
    JOHN WOOD BIG BORE TRANSMISSION DIPSTICK ADAPTER

    Posted by Rick A on May 14th 2025

    Works well , installed easy, all parts in package and stopped transmission tube bore leak

  • 5
    No more leaks!

    Posted by Unknown on Dec 21st 2024

    Finally, leaks are fixed and was an easy install.

  • 5
    Excellent fit & finish!

    Posted by Theodore Johnson on Sep 27th 2024

    The dip stick tube was very easy to install and is built extremely sturdy. Best thing of all is no more fluid drips in the driveway!

  • 5
    Works Great

    Posted by Nairb on Sep 17th 2024

    After one week of use no leaks. Not much info on installing it. Installation is pretty straight forward, just don't even try to completely remove the 19mm bolt. If you do good luck getting it back in. Just loosen it enough to remove the lower tube. Have plenty of socket extensions and a swivel on hand.

  • 5
    Fixed the leak

    Posted by Jesse W on Sep 16th 2024

    OEM tube is laughable. This has o-rings and seals properly. Fixed my leak.