Solex 27 #1 Posted September 14, 2015 I recently acquired a C Series with an 8 speed transmission. It has difficulty shifting from low to high and the oil has water in it. Plans call for opening the case and inspect for damage, can you give me some pointers on possible problem areas to look for? Share this post Link to post Share on other sites
bmsgaffer 2,053 #2 Posted September 14, 2015 What is "difficulty"? Can it shift or not?IF it can and its just stiff or stuck sometimes, I think your best bet is to drain the oil/water mix, and run some fresh oil in there. Run it for a while in all the gears with fresh oil and see if that doesn't free her up. Many times just getting the oil and water out helps a BUNCH.Some guys flush with kerosene or diesel, but I have not tried that. You may be just fine just getting cleaned up with some fresh oil! 3 Share this post Link to post Share on other sites
tunahead72 2,543 #3 Posted September 14, 2015 I agree with Brandon, don't take it apart unless you have to. I would change the fluid and see what happens, and then take it from there.You might also clean the outside of the case, especially around the seals, and check carefully for leaks after you've changed the fluid and driven the tractor around for a while. 4 Share this post Link to post Share on other sites
stevasaurus 23,274 #4 Posted September 14, 2015 (edited) I agree with the above, but I would drain it and put 2 qts of diesel (which I have done) and run it on blocks for about 20 to 30 minutes using all the gears. Diesel, like kerosene, will get into the tight places and dissolve and combine with what is there and drain out...and it is cheaper then using 90wt to flush. The problem...you still will not know what you have just buying a machine. You can pull the sifter and kind of get a little view in the trans, but it will not tell the full story. If you want to know what is going on inside your transmission, you really have to open it. Sorry...but it is true. I would still try this first, because it will clean it out a lot. If you still have problems shifting from hi to low...there is a shift plate the can bend or break to cause what you have. If you never need low to do anything...leave it in high. Let us know what happens after you flush it. Here is a link that will show you that piece I am talking about.http://www.wheelhorseforum.com/topic/17947-idiots-guide-to-8-spd-trans-rebuild/There are quite a few threads in the "Reference Section" on the main page that will show you what you may be up against. I hope you know...there is no shifting allowed if you are not at a COMPLETE STOP on these horses...not coming to a complete stop and shifting is what causes your problem. Edited September 14, 2015 by stevasaurus 5 Share this post Link to post Share on other sites
pfrederi 18,638 #5 Posted September 15, 2015 It is normal to have to try a couple times to get them to shift form High to low and vis verso. These are straight cut gears and trying to force them to engage is not a good thing. let the clutch out spin them a bit and try again 2 Share this post Link to post Share on other sites
Solex 27 #6 Posted September 18, 2015 I flushed the gearbox with diesel, let it sit for a few days and now the gears shift better than my working 300 series. This is a 1979 unit and the sludge buildup must have gummed up the shifting mechanism . Avoided opening the case and the dreaded tear down, it looks like I got out cheap.Thanks for the information, these Wheel horses are tough little units. 2 Share this post Link to post Share on other sites
stevasaurus 23,274 #7 Posted September 18, 2015 I would use it and keep an eye on leakage by the seals...maybe drain out and replace the oil in the spring. Glad that worked for you. 2 Share this post Link to post Share on other sites
