HDJ80 Driveshaft Length Question (1 Viewer)

[CaptBeardilocks]

Hey All,

I am trying to confirm the length of a rear driveshaft for a HDJ80 Manual Transmission and VCD/HF2AV/Full Time Transfer Case. My parts truck is a non-viscus (HF2A) H151 manual and the truck I'm building was an auto trans Full Time HF2AV.

I'm having trouble just flat out measuring the gap because the drivetrain is only mocked in while i fab up a custom crossmember/bash plate combo to move the new manual transmission forward. Also, it's a bare frame with new suspension on wheels, so "ride height" is not even a dream yet.

Euro4x4parts.com lists lengths of the various iterations but none of them seem to come close to my many DSs I have on hand. The one they list for MTM VCD HDJ80 (fully compressed) is ~50mm longer than my current flange-to-flange measurement in the chassis.

Can anyone tell me the correct part number or length for the rear shaft H151/HF2AV 80 series? Or maybe clarify how Toyota measures their driveshafts?

 

[mattimooseprime]

I'll try and remember to measure my driveshaft tonight. It's from a 1991 HF2A / H151. I'll do full compress and full extend for reference

 

[CaptBeardilocks]

I'll try and remember to measure my driveshaft tonight. It's from a 1991 HF2A / H151. I'll do full compress and full extend for reference

Full Time 4WD with viscous clutch? Or the early non-viscous transfer case?

I need the weird combo of Full Time Viscous case with manual transmission.

Thanks!

 

[mattimooseprime]

Hmm, I thought the HF2A and HF2AV were the same case, just different internals. well damn!

 

[CaptBeardilocks]

The non viscous clutch models are around 2.75-3” shorter than the VC transfer cases. I have one of each on the shop floor.

Thanks for looking!

 

[mattimooseprime]

Well darn, wish mine would have helped! It's most definitely going to be the same length as yours lol.

 

[SteelHunterFJ80]

Did you ever get your measurement @CaptBeardilocks ?

 

[CaptBeardilocks]

Did you ever get your measurement @CaptBeardilocks ?

I have not. I have guesstimated as close as I can with the body off. But I would love a more accurate measurement. Or a correct part number.

 

[SteelHunterFJ80]

I have not. I have guesstimated as close as I can with the body off. But I would love a more accurate measurement. Or a correct part number.

I'll get you one tonight. Give me until this evening west coast time and I should be able to get this to you

 

[SteelHunterFJ80]

What should I measure? From flange to flange or outer u joint to u joint?

 

[SteelHunterFJ80]

 

[CaptBeardilocks]

Flange to flange. 6 o’clock to 6 o’clock. Or 3 to 3. Or 7:45 to 7:45. Lol. As long as it’s the same.

 

[CaptBeardilocks]

Ah. Shaft out, not in the truck. Collapse the shaft completely and measure full length flange to flange as flat as possible.

Thanks!!!

 

[SteelHunterFJ80]

Ah. Shaft out, not in the truck. Collapse the shaft completely and measure full length flange to flange as flat as possible.

Thanks!!!

Ok looks like 2ft 4 1/4 inches on the shorter one fully compressed. Laid it in some saw horses to measure. I can get a neighbor to help me double check

 

[CaptBeardilocks]

Thanks! How long is the larger one? The rear is my issue right now.
Cheers!

 

[SteelHunterFJ80]

3ft 7 and 3/8 inches... sorry for the wait!

 

[CaptBeardilocks]

No problem! Thanks a ton for that!