Changing the Speedo gear?
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- 2mAn
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Changing the Speedo gear?
Since my motor is coming out I figure it’s time to put the correct speedo gear in. I’ve had this gear from mikeb for quite a while and after having another gear to compare it with I’m worried it’s more difficult than I had hoped.
Can anyone tell me what’s required to correct my speedo? I had a 3.7 rear end and have a 4.38 in there now.
The larger gear is the one I have, and I’m not sure which gear is the smaller one but the size difference worries me
Can anyone tell me what’s required to correct my speedo? I had a 3.7 rear end and have a 4.38 in there now.
The larger gear is the one I have, and I’m not sure which gear is the smaller one but the size difference worries me
Simon
Current Cars:
-1999 Porsche 911 4/98-build, 3.8L M96
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- jrusso07
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Re: Changing the Speedo gear?
Sorry I cant answer your question directly. I know the speedo drive gear color changes with the number of teeth. From Dean's site, "each tooth on a speedometer pinion gear represents 5 miles per hour. If the speedometer is running too high you need to get a gear with more teeth to slow it down.
If the speedometer is running too slow you need to get a gear with less teeth to speed it up".
Thanks to a forum member, I learned that the gear diameter increases with the number of teeth on the gear
If the speedometer is running too slow you need to get a gear with less teeth to speed it up".
Thanks to a forum member, I learned that the gear diameter increases with the number of teeth on the gear
Joe
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Re: Changing the Speedo gear?
Peter Harrison
1970 1600 (Stroker) - TOAD SAN (Eliza)
1970 1600 (Stock) - As Yet Unnamed
Lake Balboa (SFV) , California
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- Gregs672000
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Re: Changing the Speedo gear?
From my understanding the large orange one needs some kind of adapter which I was not able to locate. So mine sits on the bench, useless, and I estimate mph from my tach after driving along with a cell phone speedo app.
Greg Burrows
'67 2000 #588
Tacoma, WA
'67 2000 #588
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Re: Changing the Speedo gear?
The wiki doesn’t show anything more than part numbers.
Simon
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Re: Changing the Speedo gear?
I asked Dean about it, and that's what he told me. I don't think there's a way to run it otherwise... and why I just do an educated guess by rpm and cell phone app!
Greg Burrows
'67 2000 #588
Tacoma, WA
'67 2000 #588
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- theunz
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Re: Changing the Speedo gear?
The wiki does show two different sleeves, each for a certain range of teeth. Years ago when I installed my 4:62’s I bought the gear recommended by the dealer and put it in. It immediately mangled the teeth and I parked the car shortly after that, so I think that you do need to change sleeves if you stray to far from stock. I bought a used GPS from eBay for $15 that I now use for a speedometer and to track mileage. Someday I’d like to convert my stock speedo to GPS, but I’m guessing that’s pretty pricey!
Mike M
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Old enough to know better, too old to remember why!
1969 2000 solex mine since 1972, under resurrection. (Finally resurrected as of spring 2019!)
1969 Porsche 911s -worth more, but not as valuable! Gone!
2017 Lotus Evora 400 - Oh my!!
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Re: Changing the Speedo gear?
Simon - Just saw your post...I sent you the carrier (or sleeve) that is the correct one to use for the orange speedo pinion. Use that and it will fit like a glove.
- 2mAn
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Re: Changing the Speedo gear?
Theres a sleeve in there too?! I didnt see it, but I also wasnt expecting to see anything else in there
Simon
Current Cars:
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- Gregs672000
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Re: Changing the Speedo gear?
Well, if that's the case, where does one get this elusive sleeve!?
Greg Burrows
'67 2000 #588
Tacoma, WA
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Re: Changing the Speedo gear?
and to piggyback on that, how difficult is it to install? Looks like at least part of the transmission needs to come apartGregs672000 wrote: ↑Wed May 06, 2020 3:16 pmWell, if that's the case, where does one get this elusive sleeve!?
Simon
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Re: Changing the Speedo gear?
Simon,
I looked at the picture you posted and it looks like both pinions are already installed in the carriers. There's no disassembly of the transmission required. There's a hole in the passenger side of the transmission where the speedo pinion assembly slides into and engages a gear inside the transmission. The assembly is secured by a small tab and a short 6 mm bolt. The threaded portion of the carrier left exposed after installation
is where the speedometer cable is attached. I hope that helps.
Mike
I looked at the picture you posted and it looks like both pinions are already installed in the carriers. There's no disassembly of the transmission required. There's a hole in the passenger side of the transmission where the speedo pinion assembly slides into and engages a gear inside the transmission. The assembly is secured by a small tab and a short 6 mm bolt. The threaded portion of the carrier left exposed after installation
is where the speedometer cable is attached. I hope that helps.
Mike
Last edited by mikeb on Sun May 10, 2020 12:04 pm, edited 1 time in total.
- Gregs672000
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Re: Changing the Speedo gear?
Simon, can you post a pic of the sleeve when you get It please? Thanks!
Greg Burrows
'67 2000 #588
Tacoma, WA
'67 2000 #588
Tacoma, WA
- mraitch
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Re: Changing the Speedo gear?
Carrier/pinion sets are available from Nissan P/N 32702-58SXX - where xx is the number of teeth.
Peter Harrison
1970 1600 (Stroker) - TOAD SAN (Eliza)
1970 1600 (Stock) - As Yet Unnamed
Lake Balboa (SFV) , California
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Re: Changing the Speedo gear?
The 5 speed one as well as the 16 tooth 4 speed ones are all gone from Nissan. You might be able to find a few 17 tooth ones that were for the early trucks but your speedo will be off. I know Dean sells the 5 speed ones and the 17 tooth one to use for the 4 speeds. I am looking to have new correct 16 tooth ones made for the 4 speeds.
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1967 Datsun SPL311-10123 project
1967 Datsun 411 wagon
67.5 SPL311 Vintage Race car project
64 NL320 Pickup Truck
Brian
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