How To: C15a Wire-3 restoration

[Lynn Eades]

A friend of mine is just replacing a new jeep trans. with a new jeep trans. (1000km) Reason: Incorrect oil. The Hypoid oil ate the bushes in the cluster.

Jeep has bronze bushes inside the cluster gear (counter or lay shaft) and the reverse idler as well as the synchro (baulk rings) The Dodge (New Process) and Ford 4 speed crash boxes have a bush in the reverse idlers. I assume the G.M. box has bronze bushes in the reverse idler as well.

Also, bead blasting is great for the gears as stated, but!.... Total cleanliness is absolutely imperative, after blasting. It gets everywhere!

On both counts, Beware!

[Wayne Hingley]

Hi Rob: Is this the Royal Purple product you are using? In your research, did you find any other non-EP gear lube options?

http://www.royalpurpleconsumer.com/p...mission-fluid/

[Jordan Baker]

Today I took apart the top of the transmission. It was in dire need of some cleaning on the outside and at the base of the shifter. Some very very thick crudy grease. The inside looks great though. Everything came apart nicely. My only concern was that the reverse shifter yoke looks worn.

It’s part number 4.303 GM590515 Yoke reverse shifter.

The parts are all soaking in parts cleaner to help soften the hard grease.

[Alex van de Wetering]

Great work again, Jordan

Now the hard part what colour to paint it? From what I have read here on the forum they may have come Chevy grey, semi gloss black or even have been painted the final body colour of LG#3, SCC2 or SCC15

I also painted mine grey recently....and just like you I thought that would be great for spotting leaks, but I am now thinking about respraying it body colour...as that's what i think I am seeing on the factory pictures.

Alex

[rob love]

Originally Posted by Wayne Hingley

Hi Rob: Is this the Royal Purple product you are using? In your research, did you find any other non-EP gear lube options?

http://www.royalpurpleconsumer.com/p...mission-fluid/

The Q&As at the link you show says it is fine for the soft metals. I am using the 75W90 that is available at Cdn tire. My transmission shifts nicer with it, and everything I could find on it was that the synthetic was fine for the synchros.

I think Boss lubricants still sell GL3. Seems to me Dodge and the other likely will too, but pretty sure theirs will be as much or more than the Royal Purple.

[Jordan Baker]

I went out and checked on what I’m using. I was mistaken. I’m using the 75/90 stuff from CND tire as well.

[Wayne Hingley]

Thanks gentlemen. I looked up the info on the Royal Purple (Max Gear) 75w90, and it does mention that it is yellow metal safe. Ill be switching my lube this weekend.

I suppose the same would be true for the steering box, PTO and winch lubes. Is there any yellow metal in the differentials?

http://www.royalpurpleconsumer.com/products/max-gear/

[rob love]

Originally Posted by Jordan Baker

I went out and checked on what I’m using. I was mistaken. I’m using the 75/90 stuff from CND tire as well.

When I said "stuff", I was relating to the royal purple....not the Cdn tire house brand.

[Jordan Baker]

I also found that one of the fulcrum pins in the top of the shifter housing was rather worn and very loose. NOS pins have been ordered and I’ll be replacing them both.

One area of concern is that the slots on the shifter may also be worn. However I don’t have any reference to compare by. At least until I get the NOS pins. If I find the slots are worn exceisvly my idea is a follows. Mount the shifter in the mill and true up the slots. It may make them a slight bit larger. This would require a slightly larger pin. My thoughts are to use some round stock from a suitably sized drill bit shaft and turn down the one end in a lathe. This way I’d be using slightly oversized pins to fit the slightly oversized slots. What are the thoughts of the membership?

[Bob Carriere]

At least if you grind the teeth on shifting you can blame the worn parts.

I cannibalized parts from spare trannies and used section of the PA Chinese drift punch shaft for hardened pins. In fact we were reproducing CMP engine cranks on the week end and we used a battered drift punch to produce two pins for the crank.

Good luck with the tranny.

Bob C