how do i lock uni drive transaxle

[Ethan and Randies horses 65]

has anyone here ever locked a uni drive transaxle because im planinning on locking the one for my c120 I need instructions or pictures .

[stevasaurus 23,188]

There are a few threads here on the subject, but unless you are using this horse as a puller, why would you want to??  You lose a lot of your stirring ability.  If you really want to do it, you have to split the transmission and open the differential.  The pinions in a normal differential alternate with the gear up on one and down on the next and continue the rest of the way around...whether you have 4 or 8 pinions.  To lock a 4 pinion differential, you want 2 of the pinions next to each other with the gear up and the other 2 pinions with the gear down.  To lock an 8 pinion differential, you want 2 up, then 2 down, then 2 up, and then 2 down.

Edited September 29, 2014 by stevasaurus

[C-101plowerpower 1,606]

in other words, if you still want your horse to have a good turning circle, or still want to be able to steer, don't do it

 

 

 

Koen  

[diamondred 63]

I don't think I'd try locking a 4 pinion, you'd only be driving  one side of the axle gear. With 8 pinion, you'd be at least driving the axle gear 180 degrees apart.... 

[SousaKerry 502]

To be totally honest my little 10Hp stock puller will still dig with both tires until the motor quits, but I have never opened up the tranny and looked inside it.  When I got the tranny it was full of water and froze solid so I may have a locking diff from rust for all I know but the dang thing works.

[WHEEL HORSE 312-8 52]

I'm gonna lock a spare diff I have for fun in the snow.plus it will do 30mph onlynin snow

[randhad 8]

Hi,

First time posting, but been lurking/reading for a year... Anyway, bought a beat up c-101 (new tires, serviceable plow/chains/weights and running engine). I knew the tranny had water in it, the PO had poor old relics parked out in the elements throughout his property.

 

So when I opened the plug, naturally clear water began streaming out, than the milky oil followed. I let it drain and then poured in a half gal of karosene and pushed it around the yard - parked it overnight. I drained it today, pulled the tranny and dug in. Long story short, the 8 pinions on the diff have been welded in place on the one side.

 

Inside of the tranny is not bad. The gears have normal wear. I'll need to replace some needle bearings and seals. Also, the roll pin on the shifter was broken - so I couldn't get it into 2nd gear.

[stevasaurus 23,188]

randhad...welcome to posting on Red Square.  Did you have a question??  I would like to see a couple of pictures of how it was welded. 

[randhad 8]

randhad...welcome to posting on Red Square.  Did you have a question??  I would like to see a couple of pictures of how it was welded. 

Thanks Steve. I've checked out your vid's, good stuff. Made me curious enough to crack it open.

 

[randhad 8]

So who has 8 pinions and an end that they would like to trade?   1 1/8" from a C-101... Anyone?

[stevasaurus 23,188]

WOW !!!  That is too much.  Thanks for those pictures.  Can you get that axle and axle gear out of there?  You are going to want to send a "PM" to "racinfool40"  Mike...he will have the parts you need at a fair price.    Add those pictures to the PM when you send it...he will want to see that. 

[racinfool40 203]

...all I can say is wow!!! And why?????....I have no extra 8-pionion differentials they are getting hard to find in good condition and this shows why.....I know to each there own but when the parts are gone they are gone..I have run across a few that have been welded like that especially in the 4-pinion diff's...well to the junk pile they went...ruins the axle gears and the splines on the end of the axles..

[stevasaurus 23,188]

Hey Mike...if he wants...could he put in a 10  pinion differential?? 

[randhad 8]

WOW !!!  That is too much.  Thanks for those pictures.  Can you get that axle and axle gear out of there?  You are going to want to send a "PM" to "racinfool40"  Mike...he will have the parts you need at a fair price.    Add those pictures to the PM when you send it...he will want to see that. 

I can get the axle out, but the gear is a different story. That will need to be cut out.

[stevasaurus 23,188]

There is nothing wrong with a 10 pinion limited slip differential...if you are just using the horse for what it was designed to do, not using it as a puller.  Mike may have a 10 pinion differential on hand and I think it will just slip right in....still 1 1/8" axles.  Usually, guys take out the 10 pinion and add the 8 pinion for the pulling reason, this would be going the other way.  I do not see why it would not work for you and would be a lot cheaper and easier since you have the transmission tore down already.  You would not have to find a replacement transmission.  Send that PM to Mike and let's see what he has to say. 

[racinfool40 203]

The 10-pinion is an offset differential and requires 2 different length axle's..I have never tried to put one in an 8-pinion trans..the 11-44 toothe gear is different..the 10-pinion trans has the brake hub mounted to that gear and the 8-pinion it is mounted on the 3/4 shaft 3 gear cluster shaft..I wouldn't see why it wouldn't work but I have not done that kind of swap yet...I do have a couple 10-pinion diffs if needed.

Edited October 15, 2014 by racinfool40

[stevasaurus 23,188]

Mike, I was talking about a differential from a #5073 10 pinion, which should have the brake drum mounted on the cluster gear shaft.  I think the ones you are talking about are on the 6 speeds??   I am not sure if it would work, but it might be worth a look.      You know me...I am an idea guy. 

 

And as long as these guys are switching out the 10 pinions for 8...there may be some 10's floating around.  Just thinking.

 

Here is a link to what I think you have for a transmission  WH # 103916...your mushroom gear...is that 2 pieces??  (# 52 & 53)

 

Edited October 15, 2014 by stevasaurus

[diamondred 63]

Look up the 5086, the parts list show a lot of differences

 

Edited October 16, 2014 by diamondred

[stevasaurus 23,188]

Look up the 5086, the parts list show a lot of differences

 

I know, but the trans halves are basically the same...the 44 tooth may be the same...it all depends on how the 11 toothed gear meshes with the bull gear on the differential.  It is one of those things, where if you have those transmissions open...will it work??  I don't know.    Mike and I have always wondered, if you had all these transmissions sitting open on a bench...what is possible.  Mike has messed more with the 8 speeds then I have.  I have messed more with the 3 piece transmissions and the 3 & 4 speeds then he has.  The 3 piece transmissions and the 3 & 4 speeds share a lot of parts.  My thinking is, it is possible to take an 8 speed transmission that is a 10 pinion, and put in an 8 pinion differential.  It should be possible to go the other way.    We both are just trying to save horses, and transmissions are the weak link.  It is a labor of love.

Edited October 16, 2014 by stevasaurus

[ericj 1,579]

anybody have a eaton 7 trans, they have a 8 pinion  dif in them not sure if it will work in a 8 speed tho 

 

 

 

eric j

[stevasaurus 23,188]

Eric, you are going to make me look at manuals today...arn't ya.    My guess is that they are not compatible, but I really do not know. 

[ericj 1,579]

actually they are 4 pinion, but have the capability of having 8. i took a eaton 700 apart this summer and found this out

 

 

 

eric j 

[diamondred 63]

44 tooth?

[stevasaurus 23,188]

The larger gear on the mushroom gear always has 44 teeth...except in some of the early 3 piece # 5003 transmissions.  The smaller gear (that meshes with the bull gear) always has 11 teeth...except in the early 3 piece # 5003 transmissions.  That is why the mushroom gear is called the 11/44 toothed gear. 

[diamondred 63]

You had me scared for a minute, thought you were talkin bout the differential bull gear....