2001 trooper code P1870 runs about 20 miles then trans starts slipping like you shifted to neutral after it cools good it will go about 20 again what is problem and what to do to fix it?

10

Asked by Feb 10, 2013 at 09:53 PM about the 2001 Isuzu Trooper

Question type: Maintenance & Repair

6 Answers

22,235

the cooler is plugged, trans over limit temp. hope front pump is not smoked

3 of 3 people found this helpful.

7j7, ...and what to do to fix it? finish this now, you've started it-

1 of 1 people found this helpful.

P-1870 means "Transmission component slipping". A very common problem with these transmissions which sets a P-1870 is 2 valves in the valve body, the TCC regulator and isolator valves. The reason for the problem is these valves wear out their respective bores, the converter clutch apply oil passes by the worn valves lowering the apply pressure of the converter clutch. The clutch then starts slipping and chattering, sets a P-1870 and maxes out the line pressure causing harsh shifts. The way I usually fix these is with a kit from Sonnax. The valve body is removed, both tcc regulator and isolator valves are removed, their bores reamed, sleeves installed with new valves. This is what needs to be done and will cure 95% of P-1870 issues.

7 of 7 people found this helpful.
10

bob_nueske where can I get a sonnax kit? also what do I ask for? thank you very much.

1 of 1 people found this helpful.

https://www.google.com/#q=kit+from+Sonnax.&tbm=shop

bob_nueske is the feller from Wittenburg, WI that I buy my tasty smoked bacon from....no other...to die for, but out of respect I switched to juge_roy...of course a lowercase J because, I'm not a REAL judge...just a dude who's excellent with these machines~

Your Answer

Trooper

Looking for a Used Trooper in your area?

CarGurus has 55 nationwide Trooper listings starting at $2,100.

ZIP:

Isuzu Trooper Experts

  • #1
    N8dogg
    Reputation
    750
  • #2
    tennisshoes
    Reputation
    470
  • #3
    DerekW85
    Reputation
    210
View All

Related Models For Sale

Used Isuzu Rodeo
200 listings starting at $1,500
Used Toyota 4Runner
329 Great Deals out of 29,800 listings starting at $1,500
Used Mitsubishi Montero
109 listings starting at $1,700
Used Toyota Land Cruiser
16 Great Deals out of 1,094 listings starting at $5,300
Used Jeep Cherokee
294 Great Deals out of 54,403 listings starting at $2,000
Used Nissan Pathfinder
517 Great Deals out of 24,014 listings starting at $2,495
Used Jeep Grand Cherokee
900 Great Deals out of 71,642 listings starting at $950
Used Toyota RAV4
668 Great Deals out of 62,892 listings starting at $1,995
Used Jeep Wrangler
386 Great Deals out of 20,602 listings starting at $2,500
Used Toyota Tacoma
582 Great Deals out of 42,015 listings starting at $2,500
Used Isuzu Amigo
8 listings
Used Nissan Xterra
79 Great Deals out of 3,291 listings starting at $1,995
Used Chevrolet Tahoe
852 Great Deals out of 40,103 listings starting at $1,900
Used Honda CR-V
786 Great Deals out of 62,876 listings starting at $1,495

Used Cars For Sale

2002 Isuzu Trooper For Sale
17 listings starting at $3,650
2001 Isuzu Trooper For Sale
9 listings starting at $2,100

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.