1.23/1 transmission problem. lost reverse

So, no-one has ever pulled and worked on one of these 1.23:1 trannys? Has anyone tested pressure between forward and reverse?

Fantastic Finish Marine in Ohio may be able to do a rebuild or exchange for you, give them a call

quinner wrote: Fantastic Finish Marine in Ohio may be able to do a rebuild or exchange for you, give them a call

Jody at Florida Inboards would be on my list as well.
Chris,
Did you ever get in touch with Eric?

8122pbrainard wrote: FYI, pressure to ether the forward and reverse clutch packs are the same since they use the same pump.

Here's a video to a tear down/rebuild of a 1:1 done a few months ago which is quite helpful

https://youtu.be/zybPkIhVIMk

Biggest issue for me to do it myself is that I don't have a press.

If you look at the comments under the video, you'll see an exchange between Mak (the person who did the video) and myself. He suggests that there are separate ports for testing pressure in forward and reverse. Since forward works with no problem but reverse doesn't, he suggests that if pressure in the reverse port is low, then I have a blockage and there might be a way to unclog it (without pulling the tranny out).

If it is normal, then it is probably an issue with the reverse clutch pack and I have to pull it out. So I'd like to check/test this before I start pulling it out.

What I find "interesting" is that when it is in reverse, I do hear the reverse gears turning (whining), so it seems that at least something is happening, just not everything. I don't know enough about it to understand what happens when you shift into reverse.that would cause me to hear the gears whining but the output shaft not to turn. If the clutches don't engage, would you hear the reverse gear whine?    Or what could be "broken"?

I know if I go talk to the local CC dealer/shop, they'll say it needs to be pulled/rebuilt or replaced. I want to know it needs a rebuild before I pull it.

Thanks.

SNobsessed wrote: Joe in NY is knowledgeable on these. .

Do you have Joe's user name, etc. so I can reach out?

Thanks,

Gordon

It doesn't really matter too much at this point as based on what you report you are going to need to take it apart. Don't mean to ask a stupid question but are you sure the output shaft isn't spinning and your lack of reverse isn't drive shaft key related?   Usually if it sounds like its going into gear it is...   but if it isn't you are going to need to pull it apart and take a look. As mentioned it is not the most serviceable transmission in the world in that parts are so expensive it becomes quickly cheaper to buy a new or used replacement.   That being said.. no harm it taking it apart to see what gives.

So, long story short, I pulled the tranny and did a teardown. What was wrong is that there is a large gear press-fit into the hub (where the forward clutch pack is). It started to go (started slipping in reverse but not initially in forward). The last test I did before pulling it was to test all of the pressure in the ports for forward, reverse, and neutral. While doing it, forward started to slip.

When the gear slipped, it also damaged a splash guard on another part. While a normal rebuild would cost about $500 in parts (clutch packs and gaskets/seals, etc.), the two damaged parts were another $1,100.

I did check with some of the rebuild places; it was around $1,100 and a 12 month warranty assuming no parts broken. But it would have added another $1,100 in additional parts.   A new one (it's a new replacement model, model 80) was about $2200 with shipping at SKIDIM after AWSA discount. The tranny is more heavy duty and also includes a new damper plate (heavy duty), a 12" tranny cooler (replacing the 6" one), longer cooler hoses, etc.

Got the new one put in and I did an in-water tested today. Good to go skiing!

Thanks for everyone's help and comments.

Gordon

Jonny Quest wrote: I realize that $2K is a lot of ca$h, but a new tranny vs a re-built unit is a good trade-off when the cost is close. You should have many tranny trouble-free years ahead. JQ

Yup. Especially with everything brand new, new warranty, and the fact that it appears to be more robust. Plus that 12" cooler is twice the size of the old one, which I'm excited about. Not to mention that I didn't have to put the new one back together and hope I get everything right.....

Also, when I pulled the old tranny, my prop shaft was out a bit (.004-.005) when it's supposed to be .003 or less (always was less than .003). This time I got it down to less than .002. :)