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:oops: :cookoo: :oops: Oops Well, I was a bit curious when I had the fan and radiator off my deuce this last weekend and noticed how the tachometer looked very similar, though I didn't see a grease zerk (I looked), but moved on with the other task I was working on. Time to e-mail Big Mike's...

Drove the truck yesterday and the speedometer was driving backwards (the odometer rolled backwards, needle stayed at zero). Not sure how the adapter can be reversed because either end is very different and obviously intended for the given setup. By this I mean, the end the speedometer cable...

No, sorry, I haven't noticed any such noises or hums. My speedometer cable is only 5 years old and ~1800 miles (the original one was broken when I bought my truck). I wouldn't think that the cable could make a noise loud enough to be heard over the rest of the truck, except for maybe when it breaks.

No. Also, I've never heard of that before and don't understand how a lubricant will help hold something in place. The spring isn't suppose to move or spin at all. Can you please explain how greasing it is suppose to help? It wouldn't have mattered in the previous install orientation because the...

Due to the design of the 1:200 adapter, I wasn't able to keep the same orientation of the adapter on my transfer case As can be seen below, if left this way you would be unable to access the grease zerk. So I rerouted my speedometer cable over top of my transmission and down the passenger frame...

A little follow up: So after a little more than 1 year and (guessing) ~800 miles in my deuce, I pulled out the stock speedometer adapter to put in a 1:200 ratio adapter. Immediately it can be noticed that gear oil was fouling the grease in the speedometer adapter - this means that the...

Okay, call directly like last time. Thanks! Changing the speedometer adapter will result in a closer speedometer reading and thus, more accurate mileage count on the speedometer. You can "do the math" to calculate the difference between your displayed speedometer reading versus your actual...

The revival of this thread reminded me that I wanted to order another seal because I'm changing my stock 0.187 ratio speedometer adapter to the 0.200 ratio adapter (for 11.00R20 tires). Cross reference to this research post on my thread about the NSN and Part Numbers for various truck's...

You're welcome! No special disassembly at all. Just exactly as you said here. When you have the adapter separated from the transfer case, before adding the seal, I would recommend taking off the end of the adapter that connects to the speedometer cable and cleaning it out with, say, brake...

I also want to note that this year I drained and refilled my transfer case oil and continued to have no leaking issues.

I did not put thread sealant on the adapter where it screws into the transfer case (nor was there any in the first place). I have not noticed any leaking in the past 1+ year (I presume because it's only taking splashed gear oil and is not submerged). My "gut" guess is that thread sealant...

Thanks, but in my opinion, the vast majority of the thanks should go to gringeltaube, I wouldn't have even known where to look for the problem if it wasn't for him and his drawings and measurements saved be boat loads of time!

Let me tell you what I did wrong so hopefully you can learn from my mistake. I did indeed have the adapter tight into the transfer case, but I did not have the flat, or "keyed", part of the shaft properly lined up. So when it did line up (you can see where it had sat, via the shiny damage)...

(Update: This post of mine here is all operator/mechanic error - take note of the picture as I reference it in my follow up post) And it's still leaking, but appears to be leaking after the seal, coming out of the threads maybe. Maybe I don't have the seal in right, or failed on tightness, but...

My understanding is that THIS (see image) is the transfer case fill point and the speedometer adapter is above said fluid level, when at rest.

The one that says "Viton" in the description, sorry it is buried in there and I could have made it more clear. Also, yes, came right out with no issue. I still need to check the fluid level in my transfer case, but unless I understand things wrong, the adapter is located higher than the...

Last night I received my order of 2 pairs of oil seals (as discussed above). Now that I am able to inspect them in person, I am greatly inclined to agree with texas30cal that the Viton seal is superior - and it has a double lip as indicated when ordering it. But now that I can compare what a...

I spoke to a Customer Service Rep. at a local Motion Industries location, e-mailed him the pictures and measurements from gringeltaube, and the fellow recommended the following: 1: The latter one from my search above (8x14x4 HMS1 R Nitrile Seal) Item Number: 00602728 $3.25 each...

Well, I tried my local NAPA store and they did not find anything with the part numbers listed in this thread (8X14X4TCM, TTO A409), and could not find any oil seals that small in their catalog but did recommend to me that I try Motion Industries. Using their website I came up with the...

No, a new speedometer CABLE will not come with the seal and will not fix the leak. The speedometer cable attaches to a worm gear "speedometer adapter" and the oil seal is located on the end of the adapter that attaches to the transfer case.