H55F Planning/advice please :(

[Cruiserdrew]

You're going to spend real money either way you go with this, it's normal. Let me also say that changing the length of a driveshaft is a trivial exercise. You let the drive shaft shop do it and for $125 per shaft you get new tube, a balance and any length you want. At least that's the price around here for first class work.

Since you have a SBC you have another and desirable tranny option and that we should mention. You could use an NV4500. It's stronger, built to go with a Chevy and has a deeper overdrive. There is an adapter to adapt it to split case, you'd just need to adjust the lengths of your driveshafts. The added power and torque of the V8 will allow you to drive the deeper overdrive of the NV4500. So you'll have even less RPM on the highway.

I've had an H55f in 2 trucks, and for the Toyota inline 6, it's the best way to go in a wagon. But if you had more power available anyway, I think I'd opt for the deeper gearing of the NV4500..

In any case, in my opinion, the overdrive is well worth it. I do not use it to go faster, but rather to go the same speed with less drama.

 

[thewadejack]

You're going to spend real money either way you go with this, it's normal. Let me also say that changing the length of a driveshaft is a trivial exercise. You let the drive shaft shop do it and for $125 per shaft you get new tube, a balance and any length you want. At least that's the price around here for first class work.

Since you have a SBC you have another and desirable tranny option and that we should mention. You could use an NV4500. It's stronger, built to go with a Chevy and has a deeper overdrive. There is an adapter to adapt it to split case, you'd just need to adjust the lengths of your driveshafts. The added power and torque of the V8 will allow you to drive the deeper overdrive of the NV4500. So you'll have even less RPM on the highway.

I've had an H55f in 2 trucks, and for the Toyota inline 6, it's the best way to go in a wagon. But if you had more power available anyway, I think I'd opt for the deeper gearing of the NV4500..

In any case, in my opinion, the overdrive is well worth it. I do not use it to go faster, but rather to go the same speed with less drama.

I didnt know anything about this option, but same highway speed with less drama is what I am seeking. I will dive into this now.

 

[gregnash]

Yes it should be mentioned that the NV4500 is an option and Advanced Adapters makes a t-case adapter that attaches the stock Toyota t-case to the tail of the NV4500. There is more fabrication and modification that is needed with the change to the NV4500 so that is something to be aware of.

 

[orangefj45]

With the SBC an NV4500 transmission would be a better option since it has a lower first gear and taller OD.
AA offers the proper bell housing and Tcase adapter for this application.
We've set up a number of these. And we'll be more than help with parts allocation and tech support.

Georg @ Valley Hybrids & Cruiser Brothers