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[702854boy 682]

36 minutes ago, Handy Don said:

The transaxle drive pulley on the 6-speeds is unusual in that the sheave must run very, very close to the transaxle body (~.125”) to maintain the proper belt alignment to the small block K181.  As well, the input shaft is very short, not leaving enough room for a hub on the side away from the transaxle case.  To accommodate both requirements, the stock pulley has the setscrew in the valley of the sheave.

 

My transaxle came without the pulley (which should have gotten my attention!). After not finding a suitable after-market pulley I finally got a used one. I would check with the vendors on this site--AtoZ (CALL Lincoln, don’t email) and K&B horse parts (Brian Badman @76c12091520h)

My 6 speed also has a 5/8 input shaft instead of the 3/4 but it still has the 6 speed brake linkage, did they make the right pulley for the 5/8 shaft or do we have to figure out how to get something else to work

[Handy Don 16,357]

1 minute ago, 702854boy said:

My 6 speed also has a 5/8 input shaft instead of the 3/4 but it still has the 6 speed brake linkage, did they make the right pulley for the 5/8 shaft or do we have to figure out how to get something else to work

Yes, the stock pulley has a ⅝” bore.

I think that the largest engine used with 6-speed transaxles was 9hp. With increasing horsepower the width of the engine changed so a longer and thicker transaxle input shaft became necessary, along with other adjustments. 

[702854boy 682]

1 hour ago, Handy Don said:

I think that the largest engine used with 6-speed transaxles was 9hp.

Wouldn't the 1067 and 1267 have had a 6 speed?

[kpinnc 17,994]

5 minutes ago, 702854boy said:

Wouldn't the 1067 and 1267 have had a 6 speed?

 

And Raiders up to 14hp. 

 

My 1973 Bronco (hydrostatic) still had the 10 pinion differential originally. 

 

I thought the 1973-1974 period was when the heavy differentials were introduced?

 

Maybe my question should be what exactly is a 6 speed vs an 8 speed? I know the brake drum orientation changed at some point but did the differential change coincide with this?

 

And I also thought all trannies with high/low had 5/8 input shafts?

Edited 2 hours ago by kpinnc

[Handy Don 16,357]

1 hour ago, 702854boy said:

Wouldn't the 1067 and 1267 have had a 6 speed? Yes

 

1 hour ago, kpinnc said:

And Raiders up to 14hp. Nope. Only to 12 with Unidrive

My 1973 Bronco (hydrostatic) still had the 10 pinion differential originally. 6-speeds had LSD, but not all LSDs were in 6-speeds

I thought the 1973-1974 period was when the heavy differentials were introduced? Not clear to me. By “heavy” do you mean 8-pinion (vs. 10-pinion in the LSD)?

Maybe my question should be what exactly is a 6 speed vs an 8 speed? I know the brake drum orientation changed at some point but did the differential change coincide with this? 

6-speed has 1-2-3-R, Hi-Lo, brake drum close to rear axle & clockwise rotation (forward), and LSD.

8-speed (apparently from 1970) moved the brake drum and dropped the LSD (and added dipstick?)

And I also thought all trannies with high/low had 5/8 input shafts? I think you are correct here. Length, though, I’m not sure. 

Apologies.

Here’s the info from the Unidrive Repair Manual. “III” indicates 6-speed version (5060 and 5071); “II” indicate 3-speed (5053 & 5058)

The Raider 10 & 12 did use 6-speed in ’68 & ‘69

No 6-speeds after 1969

 

 

Clearly my memory has gotten fuzzy on the input shaft lengths and diameters.

Edited 1 hour ago by Handy Don

[kpinnc 17,994]

22 minutes ago, Handy Don said:

Clearly my memory has gotten fuzzy

 

For me, that's everything. 

 

Thank you for the clarification. 

[Handy Don 16,357]

9 minutes ago, kpinnc said:

 

For me, that's everything. 

 

Thank you for the clarification. 

Thank YOU for the call out!

It just occurred to me that the input shaft accommodating the wider, large block engines could have been as simple as using a pulley with a normal hub with the hub toward the case. That would move the sheave outward by perhaps an inch compared to the snug-to-the-case, setscrew-in-the-sheave pulley on “small block” versions, as on my “upgraded” 854!

[kpinnc 17,994]

40 minutes ago, Handy Don said:

It just occurred to me that the input shaft accommodating the wider, large block engines could have been as simple as using a pulley with a normal hub with the hub toward the case. That would move the sheave outward by perhaps an inch compared to the snug-to-the-case, setscrew-in-the-sheave pulley on “small block” versions, as on my “upgraded” 854!

 

I wish the "newer" 8 speeds didn't have such short input shafts. The transmission pulley on my 310-8 chewed the seal and the place for it completely out. The case was effectively ruined. There wasn't enough material left to cut in another place for a seal. By the time I noticed the leak it was too late. 

 

Luckily I had a spare transmission...