- Thread starter
- #41
I no longer have a Mark's gear set. (Sold it)
Who has put a Toybox behind an H55?
- Thread starter RufusTheDufus
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- Thread starter
- #43
Someday I hope to use that cool gauge cluster and knobs.
I bet you need a new one for that toybox.........
This is the entirety of my marketing strategy btw; getting a little tipsy and poking fun at my customers. Served me well thus far!
Regardless, good tech here, you're going to have some sweet trucks.
ok I have an early style split case ie 34MM shaft. and am wondering how the gears go to the crawl box out put shaft?? I have a huge gap on that shaft before the oil seal wondering what is supposed to go on that shaft between the crawlbox and the split case? if i leave this the way it is I rub the gear on the split case and the gear is trying to go thru. the oil seal. Help please, everythig was going smooth till this occured.
- Thread starter
- #46
Isn't the oil seal supposed to ride on that machined surface of the gear?
Your shipment from Marlin should have included some spacers and shims that fit over the output shaft of the Toybox. This is how Cam explained it above:
You should be able to arrange the shims in a sequence that will line up the tcase input gear at the correct spot so the oil seal is alined on the smooth machined face of the gear. I found it helpful to install the whole stack on that shaft out to the nut. That way you can be snug the nut down and be sure everything lines up properly.
Your shipment from Marlin should have included some spacers and shims that fit over the output shaft of the Toybox. This is how Cam explained it above:
You should be able to arrange the shims in a sequence that will line up the tcase input gear at the correct spot so the oil seal is alined on the smooth machined face of the gear. I found it helpful to install the whole stack on that shaft out to the nut. That way you can be snug the nut down and be sure everything lines up properly.
ok but i have an early split case so I don't use that spacer that came with it. so I should leave the 3 allen keys in, and put the bearing in front of the tcase,then shim from there, or do I put some shims in between the transfercase and toybox or do I just let that bearing ride on the 3 allen head bolts
- Thread starter
- #48
Finally getting around to doing some testing with the new Toybox. I had to pull the Toybox off the tranny. I didn't know I needed to clearance the 5th gear shift rail. The Toybox adapter does not allow enough movement for the 5th gear shift rail to fully engage the shift fork/hub sleeve. I had to grind .040 inch off the end of the shift rail to get it to work properly.
- Thread starter
- #49
After about 25k miles I had to pull the transmission for an engine swap. (I'm going to a 3B so I need to swap the H55 input shaft to the fine spline type.) I was very surprised to see that the splines on the H55 output shaft going into the Toybox are trashed. They are warn more than 50% thru. Any idea what would cause this?
(link to high-res version)
The Toybox input gear appears to be just as bad.
(link to high-res version)
The Toybox input gear appears to be just as bad.
Totally normal as far as I know... not good, but common. There isn't so much talk about it here in 40-tech (perhaps since most 40's have the older cases) but the 60 and 70 guys are always talking about this phenomenon.
If your shaft wasn't cut for the Toybox you could buy a special gear that was attached permanently to the PTO gear and engaged all the splines from the tranmission to the PTOgear in order to bypass the worn area. Example:
https://forum.ih8mud.com/60-series-wagons/515894-new-goodie.html
Further reading:
https://forum.ih8mud.com/60-series-wagons/439720-fj62-output-shaft-drive-gear-destroyed.html
Here's a DIY solution (useless for you with the cut shaft, sadly)
https://forum.ih8mud.com/60-series-wagons/402440-3fe-5-speed-bit-more-5.html#post5947749
If your shaft wasn't cut for the Toybox you could buy a special gear that was attached permanently to the PTO gear and engaged all the splines from the tranmission to the PTOgear in order to bypass the worn area. Example:
https://forum.ih8mud.com/60-series-wagons/515894-new-goodie.html
Further reading:
https://forum.ih8mud.com/60-series-wagons/439720-fj62-output-shaft-drive-gear-destroyed.html
Here's a DIY solution (useless for you with the cut shaft, sadly)
https://forum.ih8mud.com/60-series-wagons/402440-3fe-5-speed-bit-more-5.html#post5947749
- Thread starter
- #51
Wow, amazing that it's "normal" to have this much wear in only 25k miles. It would be awesome if the Toybox input gear had long splines like that Jack McNamara unit.
"Normal" may have been a poor choice of words... 25k surprises me too. But misery loves company.
Since spline wear accelerates based on the amount of freeplay between the shaft and whatever rides over it [input gear, spider gear, adapter shaft] it makes me wonder what the tolerances were like on the input shaft of the Toybox when it was new?
- Thread starter
- #54
It was fairly tight. I had to file the splines on the output to get it to mesh properly with the input gear. I didn't have to take much off. I did it by hand with a jeweler's file. I wonder if this filing is the root cause of the wear? I didn't polish the splines afterwards. Is the output hardened and filing could remove the hard surface?
There are photos of the splines on the shaft and input gear earlier in the thread.
It looks like I'll need a new input gear on the Toybox too. It's warn just as badly as the output shaft.
It appears as though the input gear on the Toybox isn't supported very well. I need to measure the amount of play. It feels like a lot. The rear main shaft bearing in the trans seems OK but I haven't pulled it yet to inspect.
There are photos of the splines on the shaft and input gear earlier in the thread.
It looks like I'll need a new input gear on the Toybox too. It's warn just as badly as the output shaft.
It appears as though the input gear on the Toybox isn't supported very well. I need to measure the amount of play. It feels like a lot. The rear main shaft bearing in the trans seems OK but I haven't pulled it yet to inspect.
Subscribed.. Having had toyboxes in multiple trucks i've not seen what your showing yet. I've got an H55F on the shelf that had a toybox behind it, i'll take a look at the splines on it for you as well.
hmmm. interesting I have this same setup with no probs. that I know of at first I was thinking you got the shaft too hot when you cut it and took the hardness out or the other probability is the spline isn't as hard that far down the shaft, but neither would account for the toybox end having the same wear. next time i put mine together though I will definitly put some loc-tite on splines to take up the slop.
Here is another h55 shaft that was run in a toybox no signicant wear like you show
- Thread starter
- #59
Do you still have the Toybox that was attached to? I'd like to know if there's any play in the input gear on the Toybox. I think the bearing that supports the input gear is bad in mine because I can wiggle the input gear around quite a bit.
That one was one of the Florida crews rigs I've run another nineteen spline before and not had issues either I have a toybox in the wagon but am using a twenty three total spline male input
Only thing I could dig up might be a spare input gear that was from the forty which would be nineteen spline and possibly a ten spline input and a new ten spline output for an h42
Don't have much else lying round
Only thing I could dig up might be a spare input gear that was from the forty which would be nineteen spline and possibly a ten spline input and a new ten spline output for an h42
Don't have much else lying round