Question about 1998 Chevrolet S-10 Pickup

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Speed Sensor for a JEEP/ GM CONVERSION...?

I JUST INSTALLED AND WIRED A 1995 GM 5 LITER (305 c.i.) ALONG WITH ITS 4L60E, AND COMPUTER INTO A 1995 JEEP WRANGLER. THE TRANSFER CASE IS AN NP 207
I AM TOLD I NEED A SPEEDOMETER SENSOR WITH A PULSE RATE OF 40 ( LOOKED MY COMPUTER NUMBER ON A WEB SITE) THE SENSOR NEEDS TO MOUNT TO MY TRANSFER CASE.(ACCORDING TO THE TRANNY GUY) aND I NEED MY JEEP SPEEDO CABLE TO HOOK TO THE SENSOR SO MY SPEEDOMETER WILL WORK. i HAVE FOUND SEVERAL UNITS THAT CLAIM TO WORK, BUT THEY ARE INSTALLED TO THE ADAPTER THAT MARRIES THE TRANNY AND THE TRANSFER CASE. (TRANNY GUY SAYS IT WILL WORK IN 2 WHEEL DRIVE FINE , BUT WHEN YOU USE 4 WHEEEL DRIVE IT WILL CHANGE RATE OF OUT PUT AFTER TRANSMISSION. HELP..

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  • dgardn14724 Mar 16, 2009

    I have a 1990 Jeep Wrangler that I am converting to a 2006 5.3 vortec. I have the 4l60e tranny and all engine electronics. I have obtained a NP231 xfer case from a 1985 Blazer and adapter from an 03 truck. All bolts together fine with the correct engagements lengths, but I am perplaexed what do do about the speed censor, Any Idea's or solutions?

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6 Suggested Answers

  • 314 Answers

SOURCE: 1999 Chevy 4x4 engaging

Check the solenoid at the front axel. This is a rather common prob. First check that power is at the axel, got power, clean and put it back. Please do not even look at the tranfer case! At worst you may need to replace the axel solenoid! Frankster016

Posted on Nov 22, 2008

Big Poppa Ma
  • 302 Answers

SOURCE: Speedometer runs erratic and transmissions drops to second gear.

The ECM or TCM may be the culprit, its also possible that a ground wire is no longer grounded or partially grounded giving you the erratic speedometer.

Posted on Dec 08, 2008

MrScary66613
  • 1990 Answers

SOURCE: 4L60E slipping and not locking up

Very well could be taht the Computer is not recieving the Shift codes Correctly. Just for an Easy Solution, Remove the ECM Fuse from the Fuse panel for 2 or 3 Minutes to Reset the Computer and let me know what you get.

Posted on Dec 31, 2008

  • 5 Answers

SOURCE: Can't engage 4X4 wheel drive or disengaging

Replace evry vacuum line that has any thing to do with the 4 wheel drive. Worked 4 me

Posted on Jan 26, 2009

  • 538 Answers

SOURCE: 2000 blazer 4 wheel drive problem

It's most likely the "four wheel drive actuator" This is located on the front differential housing. It's cylindrical shaped and has a large hex (about
1-1/4") and two wires coming out of it. Usually they short out and blow the fuse but, I've also seen where they just quit working and sometimes they just get slow to work. The "actuator" has a heating element in it and it warms up, some sort gas, causing it to expand thus engaging the front wheels. In cold weather it may take a minute or so for it to engage, so put in four wheel drive and wait for a bit and see what happens.

Posted on Jan 05, 2010

Molson02536
  • 3854 Answers

SOURCE: reset code trailer towing may set code gm 4l60E

Diagnostic trouble code P1870 (Transmission Component Slippage) is a General Motors-specific code whose set parameters are determined by transmission type and engine size. The PCM monitors and compares engine speed to vehicle speed after the converter clutch has been commanded ON in either high gear or Overdrive. Should the expected rpm ratio exceed predetermined parameters, DTC 1870 sets. And upon doing so, the PCM elevates the transmission main line pressure and stops converter clutch apply.

Once the vehicle has made it to a cruise state, the PCM then begins to monitor the vehicle's cruise ratio. If at some point the transmission begins to slip, P1870 sets and line pressure is elevated in an attempt to stop any further slippage and prevent further damage. This would explain why DTC 1870 Ls often accompanied by a complaint of a hard 1-2 up shift.

When this code sets, it could have any number of causes, ranging from the sump running low of fluid to a malfunctioning torque converter. Take a GM 4L60-E transmission, for example. When it's in Overdrive, the forward clutch and the 3-4 clutches are applied, as well as the 2-4 band. Now add the converter clutch. This is what the PCM monitors at cruise. If the ratio breaks away, the cause could be any of three components, the hydraulics that operate them or the electronics that control them. Fortunately, experience has shown that in most cases, the cause can be traced to some form of converter clutch failure as a result of valve body concerns. With GMs 4L80-E transmission, this code has usually been the result of a cracked converter clutch piston.

Put a line pressure gauge ($55 shipped on Ebay, or visit a local trans shop) on the pressure test port and go for a drive to verify proper line pressure. Base pressure at idle in P,N,OD should be around 70psi and around 140psi in R. Max line pressure should be at least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure is low, trans or pump is worn out. If max pressure is low, check EPC solenoid. If reverse is slow to engage, and line pressure does not come up to at least 130psi in reverse, replace the boost valve with a Transgo 0.049" - 0.500" boost valve (easy fix in pan), and replace the servo with an upgrade servo from a Corvette 4L60E. This will give you a more firm shift and address the DTC 1870 which is common to a weaken Boost valve or faulty EPC valve.

Posted on Jan 07, 2010

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