New Speedo Gear Does Not Fit - JeepForum.com
 
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post #1 of 11 Old 01-08-2012, 07:39 PM Thread Starter
NoNative
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New Speedo Gear Does Not Fit

I bought this new speedo gear from PATC transmissions for my 86 CJ-7. Here's the link to their website - http://www.transmissioncenter.net/sp...n_______va.htm

I'm running 33X10.5 KM2s regeared to 4.10s with a Dana 300. With that info the guy sold me this long shaft gear with 33 teeth. See the pics below.

The only problem is the technician who's done a ton of work to my CJ said it didn't fit. This guys really good so I assume he's on the money.

Where did I go wrong? I'll take all the help I can get.

Attached Thumbnails
005.jpg   006.jpg  

1986 CJ-7 Laredo, 258, AX15, AC Dana 30/44, Ox Lockers, Howell TBI, DUI, 4.5" RE YJ Springs, 1.25" BL, clocked & twin-sticked Dana 300 with Lomax 4-1, 4.10s, 33s, PB, 8000# winch, YJ Roll Bar, Factory 20 gallon tank.

1984 CJ-7 Renegade, 258, T4, AC, Howell TBI, DUI, 2.5" OME YJ Springs, 3.53, 31s, PB, Warn bumpers & 8000# winch, Factory 20 gallon tank

1984 CJ-7 Renegade, 258, Auto, AC, 3.31s, PB, Factory 20 gallon tank, Bone stock except for 31s
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post #2 of 11 Old 01-08-2012, 08:08 PM
only in a jeep cj
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The main difference I see is the gears I've seen have squared teeth where yours has rounded teeth that seem larger. Of course your guy did have it in the correct index? as there are 3 settings depending on size.

Ed
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post #3 of 11 Old 01-08-2012, 09:07 PM Thread Starter
NoNative
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Quote:
Originally Posted by only in a jeep cj View Post
The main difference I see is the gears I've seen have squared teeth where yours has rounded teeth that seem larger. Of course your guy did have it in the correct index? as there are 3 settings depending on size.
Tell me what you mean by "index" and "3 settings". Assume I know very little about speedo gears and you'll be giving me too much credit.

Thanks for your help!

1986 CJ-7 Laredo, 258, AX15, AC Dana 30/44, Ox Lockers, Howell TBI, DUI, 4.5" RE YJ Springs, 1.25" BL, clocked & twin-sticked Dana 300 with Lomax 4-1, 4.10s, 33s, PB, 8000# winch, YJ Roll Bar, Factory 20 gallon tank.

1984 CJ-7 Renegade, 258, T4, AC, Howell TBI, DUI, 2.5" OME YJ Springs, 3.53, 31s, PB, Warn bumpers & 8000# winch, Factory 20 gallon tank

1984 CJ-7 Renegade, 258, Auto, AC, 3.31s, PB, Factory 20 gallon tank, Bone stock except for 31s
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post #4 of 11 Old 01-08-2012, 09:51 PM
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He means the housing that holds the speedo gear has an arrow on the side. The top part has three lines and are stamped with gear size range. Like 28-34, this is just an example. The next index might be something like 35-38. Again, I am making up these numbers. You have to align the correct index range with the arrow on the housing.

Here ya go.... picture is worth everything. There is a small notch for each range. Not the hold-down notches. http://www.jeepforum.com/forum/f8/no...2/#post6803542

Scroll down and you can see the arrow that Yellow85cj painted red.

'84 CJ-7 | REBUILD IN PROGRESS
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post #5 of 11 Old 01-08-2012, 10:34 PM
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That gear looks normal to me. I would bet your mechanic did not turn the holder to the right index like VACJ7 said. It is very easy to turn the gear holder to the right index. The holders usually have so much grease on them that you don't notice that it has gear range numbers all around it.
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post #6 of 11 Old 01-09-2012, 05:26 AM
waterdowg
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That were I got mine from. It was right on money, once I lined up the holder to the mark.
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post #7 of 11 Old 01-09-2012, 06:04 AM
Matt1981CJ7
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My speedo gear stopped fitting when my a$$ got too big for it.

Sorry, I had to say it

Matt
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post #8 of 11 Old 01-09-2012, 06:11 AM
lucdog
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Quote:
Originally Posted by matt1881cj7
my speedo gear stopped fitting when my a$$ got too big for it.

Sorry, i had to say it :d

matt
please, no pictures.

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post #9 of 11 Old 01-09-2012, 07:31 AM
85LaredoCJ7
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Any more info on this? I have 4.56 gears and 32" tires. How do I know what gear to order? Is it a do it yourself, or leave it for the tranny guy?
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post #10 of 11 Old 01-09-2012, 07:39 AM
foggybottombob
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Quote:
Originally Posted by 85LaredoCJ7 View Post
Any more info on this? I have 4.56 gears and 32" tires. How do I know what gear to order? Is it a do it yourself, or leave it for the tranny guy?
You need to use a GPS and drive at about 50 to 60 mph true speed (on the GPS). Then note your speedo indicated speed against your true speed. The ratio of the two will tell you how much you need to increase or decrease the tooth count on the gear you have. Once you have two speed numbers and know what gear you have now, post it here on the forum and 40 people will tell you how to figure out what gear you need.

Assuming you have a Dana 300 Tcase. You can pull out the gear holder you have now and check your current gear in about 5 minutes.
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post #11 of 11 Old 01-09-2012, 07:56 AM
waterdowg
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Once you have the gear it is a do it yourself job. Have unscrew the speedocable nut, remove one bolt. Pop out the speedo gear holder. the gear should come out with it. The reverse the order. Its really easy...
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