Identify a LT77 gearbox??

[Workshop Help]

I'm trying to recall what website forum wherein the viscosity of the various ATF's were being discussed. I don't think it was fordf150.net, more likely britbike.com. My brain seems to want to think that engine oil is weighted, say 10-30w, while gear oil is 90w, and ATF is labelled differently. I could be way off on this, but it seems that our Walmart ATF is about a 20wt fluid. There is also a website by the 'oilguy'(?) who has researched lubricants and offers dissertations on them. I believe you will want to do some rather intense web surfing on this topic.

In the short run, perhaps if you called around to a several local shops to gather various opinions, you might gain some knowledge and pass it around back here.

Today, as the weather is warm, our early morning forays showed the gearbox shifted far easier starting out than when the temperature was about 40 degrees F cooler. It is true, the LT77 is a cold blooded beast.

Mildred Hargis

[lebochet9]

As a footnote to the identification. My Box is a C-suffix box, with the reference number: CL085-215C stamped on it.
According to the Rimmers book, the change point is CL45501C. Im wondering if this should be CL<b>0</b>45501C as there seems to be a digit less in their number than what is stamped on my casing.

My A-Suffix box does have smaller input shaft bearings. Scarily though, it had been built with the later front cover (with bore for larger bearings and selective endfloat washers) and the smaller selective washer was floating around in the bore...

Anyhow, I ordered parts for the later box and they are the correct size, but this could be confusing. I had understood that the bearing change took place with the change of suffix letter (A to C), but the Rimmers data seems to suggest otherwise.

Confused? I am....

1980 DHC TR7-V8 (was an 8V, then a Sprint)
Back on the road after 3 years restoring...