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Old 06-16-2006, 11:05 AM
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speedometer help please

I finally installed a TH350 behind the diesel engine I swaped instead of the 4L60E, too many problems with the electronics, the 350 works great. please suggest a way to make the speedo work.
Does the tone ring from the 4L60E could be removed and installed in the TH350 output shaft? could the sensor be installed in a big gear BOP type 350 tailshaft?
Is there a sensor that can be installed in the 350's speedo gear that delivers a signal useful for the speedo to work? I think I've seen some in maybe early S10 blazers?
the truck is a 1993 C1500
thanks.
Augusto.

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Old 06-16-2006, 06:44 PM
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Some of the Turbo 350's with the BOP pattern use the larger speedometer housing ... the same as a 700R4 ...



So ... with a BOP tail housing ... the 700R4 stuff should work ...
But I am guessing ... Have NOT done it ...
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Old 06-16-2006, 06:56 PM
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I seem to recall not long ago reading one of Tony's (Crosley) trans pages about speedos. The 350 plastic gear is slightly larger than the 700 reluctor. Don't know if you could bore it out and then try the BOP speedo housing, might work if you find the right combination.

Mark
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Old 06-17-2006, 07:44 AM
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my main concern now is about the tone ring (reluctor) in the 4L60E's tail shaft, seems like is machined in the shaft, is it removeable? I expected to see a clip holding it like the speedo gear but this one seems like is a one piece.
thanks for the replies.
Augusto.
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Old 06-17-2006, 08:00 AM
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visit my page:

CLIK HERE

IF you use a t-350 BOP style tail housing , the speed-O parts must match... A t-350 Speed-O gear on the output shaft and the outer bullet insert for the driven speed-O gear must be used together.

IF you read my page you will see the t-350 BOP speed-O bullet and 4L60 bullet have different locations on the sealing O-ring... a photo provides comparison information.

Also notice the BOP & 4L60 bullets place the driven gear in the correct / same location into the tail housing.


The electronic speed-O ring can be removed as my page indicates.

good luck ,

post back if you can.







Quote:
Originally Posted by Augusto
my main concern now is about the tone ring (reluctor) in the 4L60E's tail shaft, seems like is machined in the shaft, is it removeable? I expected to see a clip holding it like the speedo gear but this one seems like is a one piece.
thanks for the replies.
Augusto.
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Last edited by Crosley; 06-17-2006 at 08:13 AM.
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Old 06-17-2006, 08:25 AM
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that's exactly the info I needed, thanks a lot.
Augusto.
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Old 06-17-2006, 10:44 AM
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Quote:
Originally Posted by Augusto
that's exactly the info I needed, thanks a lot.
Augusto.
Please remember the parts must match... BOP speed-O gears with a BOP tail housing.

Drive plastic gear on output shaft and driven gears are different from chevy to a BOP application on a t-350 tranny.
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Old 06-19-2006, 06:55 AM
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actually my idea is installing the electronic speedo parts from the 4L60E in the TH350 so I can make the electronic dashboard work with the older tranny.
thanks for your interest.
Augusto.
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Old 06-19-2006, 09:08 AM
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the reluctor (metal disc) of the 4L60E output shaft will fit on the t-350 shaft. Watch for proper position so the sensor will recieve a signal.

Also check :

www.jagsthatrun.com for various speed-O conversion items.

Their web page is a bit cluttered... at the bottom are some listed 4L60E speed-O parts that may assist in several conversions for folks



Quote:
Originally Posted by Augusto
actually my idea is installing the electronic speedo parts from the 4L60E in the TH350 so I can make the electronic dashboard work with the older tranny.
thanks for your interest.
Augusto.
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Old 06-20-2006, 09:33 AM
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very informative site, thanks Crosley.
Augusto.
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Old 06-23-2006, 05:46 PM
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UPDATE.

I couldn't find a short BOP tailhousing so I took the 4L60E's and cut a 34mm slice from the center part, near the seal, TIG welded back and installed it in the TH350, took the reluctor from the 4L60E, it took some heat and a big puller to remove, then installed it very easily in the 350's shaft, now the electronic speedo is working with the TH350.
Thanks to all for the advise that helped me acomplish success.
Augusto.
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