[BobBarry]

I want to seal off the dipstick tube on my TH400 with the newer-style locking dipstick. A couple questions:

* Did Chevy ever install that locking-handle style dipstick on the TH400's? My local tranny parts-supply place only carries the slip-in style for the 400's, but the locking-style for the TH700R4.

* Does the locking-handle style dipstick work with the original tube, or does it require a special tube as well?

* Anyone have a part-number handy for a TH400 locking-handle dipstick and/or tube? There are no decent parts-counters at dealers in these parts, and GM Parts Direct works best if you already have the number handy.

 

[Snowbird13]

I may not be much help, but one off of a 4l80E might work since they are based on the th400.

 

[BobBarry]

Good thinking, you're probably right; I've got a spare one of those in the garage I can measure up to check for interchange.

 

[84k5bd]

what i did for mine was to get the locking dipstick from a 700 and i cut it to the same legnth as the one for the 400 and marked it with an engraving tool. i know it's not factory but it works just the same.

 

[BobBarry]

what i did for mine was to get the locking dipstick from a 700 and i cut it to the same legnth as the one for the 400 and marked it with an engraving tool. i know it's not factory but it works just the same.

Hey, I think I bought this TH400 from YOU and your brother!

I'm finally getting it all in there, so this is one of those unending little details that I'm wrapping up.

Making a 700 dipstick work is probably just as good. Now I've just got to find one.

 

[84k5bd]

that was a while ago, are you almost ready to start driving it? btw i got my stick out of a late model van.

 

[BobBarry]

Yes; ignition, fuel and wiring to the engine, lines to the brakes and driveshafts are all that's left.

Oh, and about a billion other little things that I'll forget until the last moment...

 

[lumpdog]

GM did make a locking dipstick for the t400, just order one for a 90-91 truck with a turbo 400 and you will be set.

 

[BobBarry]

GM did make a locking dipstick for the t400, just order one for a 90-91 truck with a turbo 400 and you will be set.

Thanks Lumpdog!