High Speed Transmission

[Stekay]

I'd like to convert my 710K over to the high-speed transmission. What's the origin of the transmission, and does anyone know of a source or part number?

[Jim LaGuardia]

Waste of money. That trans is from a TD Pinzgauer, they are around $4500 outright. Do not be fooled into trading your stock trans as a core. The only parts needed to convert it for Gas units is the trans mounting plate and studs/nuts, the TD shift tower needs to be re configured so the shift lever comes out the left side.
Power loss on hills will have you to a crawl in some cases.
The TD trans does best in 712 models due to transfer case gearing .
Best advice before spending money is find someone who has one installed in a 710 and talk or ride with them.
That kind of money buys fuel injection.

[David Dunn]

In reality, even the 712 T case is geared higher than the 716/18's... where the 712 is 1 to 1 in hi, and 1.92 in low, the TDs are 1.06 and 2.452.
I had put one in my 712...jf I hadn't sold it, I would have taken it out... absolutely worthless for stop and go traffic.. you end up with a 3 speed tranny for the city

[Stekay]

That's basically what a stock 710 has now. 2nd 3rd 4th around town. With the high speed, I'd have 1st 2nd 3rd around town and 4th and 5th for the open road.
I'm mostly concerned with the RPM on trips out to PA and down to the Outer Banks from NY. It's a lot flatter on this side of the country, but the playgrounds are farther away. Hopefully someone thats had the H.S. trans in a 710 will chime in.

[audiocontr]

I've had the same high speed in all 3 of my pinz. 710s and 712s. It originally came in the 710 and I swapped It each time. I prefer it over the stock but I'm 95% on asphalt where the increased speed is very convenient.

That being said, I would never pay 4500. I valued the unit I own as a $2000 option in the pinz I just sold and the current owner did not want it.

[David Dunn]

No, you'll have 2nd , 3rd and 4th.
1st gear in a TD is still a granny gear and only used for inclines and 4th gear is 1 to 1, the same as 5th in your current tranny.2nd and 3rd are wider apart...none of the gears are the same... and when you get to where you want to play, the low range is much higher.
Your T case in your 710 is .88 overdrive in high, and 1.69 in low range... and before you ask it, NO, a TD t case will not fit in a gas Pinz

[Stekay]

Stock 1st= 5.33, 2nd=3.24 High Speed 1st= 4.25

Seems not too bad a gear to start off with if running a tall tire, but with that being said, the price seems way out of line for the benefit. I'm now wondering if something like a Tremec would be another alternative. Oh well, back to lots of other upgrades for now. audiocontr, if I head down to the banks, maybe I can get a check ride in yours with the high-speed
Thanks to all for the input -Steve

[audiocontr]

We will be in the banks mid August. Damn sand.

[David Dunn]

If you need to start off in first gear because of taller tires on a 710, the OD will be useless except for coasting downhill, you’ll be expecting too much from a 89 hp engine to drive high speeds. You also need to multiple the numbers by .88 because of the 710 transfercase’s overdrive in high range. The 712’s high range is 12% lower than the 710 and the 716/18 is 18% lower than a 710, and you lose one useable gear to the overdrive. It’s makes life a little harder to keep the engine in it’s power band.

BTW, in the late 716/18’s, the optional manual trans was a 6 speed, and that was with the strong VW 2.5TDI engine.

[Jimm391730]

in the late 716/18’s, the optional manual trans was a 6 speed

What tranny was that? Any idea what the ratios were?