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TR6 Issue Installing HVDA transmission. Need your input.

2wrench

Luke Skywalker
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Good day, everyone.

I have prepared my HVDA conversion Toyota transmission to the point of installation. Upon sliding the transmission into place,
the bell housing is open a gap of approximately two inches at the bottom. The bell housing was hung on the top three threaded studs and nuts placed as loose as possible to hold the tranny into place.

The kit hardware nuts and bolts are two short to bolt through: 1 1/2 inches, I think.

I considered buying longer bolts and snugging the unit up, but I am concerned that doing so may be bad as it could be putting stress between the input shaft and the input shaft bearing. Transmission on horizontal plane is hanging slightly high at the rear.

Also, at the rear of the transmission the cross brace with rubber bushings has been removed to install the new rubber. There are three sets of holes to mount the cross brace. Original installation, rear and center holes were used. Upon re-installation, center and forward holes are an option. Any input? Must this part be installed prior to sliding the tranny into place? Is there room to install this part after the transmission is situated for bolting?
 

charleyf

Jedi Knight
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The gap at the bottom , I assume is where the inspection plate goes. If the front face of the tranny and the rear face of the engine mate up together both top and bottom then your tranny should not have an alignment problem. Lastly getting the rear support in is a matter of putting together whatever you can where you can get to it. So YES try to assemble whatever you can at least loosely prior to finishing up at the front .
Charley
 
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2wrench

2wrench

Luke Skywalker
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Thank you. What I found was my pressure plate was out of alignment. Once that was corrected, the transmission was put into place. As for the the cross member at the rear of the transmission, it was installed using the two rearward (of the three sets) of holes. I bolted all parts together: Rubber bushings, cross brace support and new supplied mounting bracket etc., and lifted the engine and tranny on jack enough to slide the whole enchilada into place, a slight challenge, but completed. I am approaching some of the final installation stuff and wanting to verify what I have done so far with Herman.
Thanks,
Dennis
 
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2wrench

2wrench

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Letting you know how it's going --

First, to correct an original post, my original problem of alignment was the clutch disk, not the pressure plate, was out of alignment. I am sure this makes more sense, but I am also pretty sure anyone who might have looked knew what I meant, reading between the lines.

The transmission is installed and I am moving forward, slowly, towards the finish. I did get a visit from a fairly local Forum Member Dan and he was very nice and helpful. The original installation kit from HDVA requires the use of a collar that will lock the "extendable" drive shaft into place. Upon discussion with Dan, I am convinced the better idea is to custom cut and install a drive shaft to the exact length and install that new, balanced part. Dan says his collar eventually did not hold and his experience was that the rear seal on the W58 transmission leaked, "bled out," and severely damaged the tranny. I am going to learn from his experience, which is why I am here.

So now I will be dropping the rear-most, and forward-most exhaust , as necessary, and pull and replace the drive shaft. More time, but I think worth it. I do not want to have any problems with this upgrade.

Thanks,
Dennis
 

charleyf

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To each his own. But of the four HVDA conversions locally none of us has had any problem with that collar. I am confident that Herman would not have included it in the kit if it had much of any failure rate.
Charley
 
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2wrench

2wrench

Luke Skywalker
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I discussed the collar concern with Herman. His response was if it failed, the installer likely did not follow closely his directions on installation. Then he strongly recommended I remove my drive shaft, clean and Lock Tite the dust cover threads, reinstall the drive line fully extended and verify specs, then install the collar, once everything looked good. He fully stands by his product design.

I just figure if I have to remove my drive shaft, might as well rebuild and balance all in one piece, skirting the issue that I could mess it up.
Lastly, Herman has been great. Very patient and helpful, and I purchased his product for its good reviews.
 
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