Question about 2003 Ford F150 Regular Cab

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Trans 40R70W

I was wondering if ther is anyway i can inprove the performance .

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Add fuel injector cleaner to your gas to keep it clean.should also improve your gas mileage

Posted on Aug 09, 2008


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I have a 97 Saturn sc2 I just had someone replace

there is really no difference the radiator is just a cooler with a coil , some have a larger and smaller fitting so you cant mix them up look it over.

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What kind of fluid do i use in my 2004 ram 1500 quad cab for power steering?

all the info i have heard or found is to use ATF+4 all the auto manufacturers have replaced the ps fluid with ther type trans fluid supposed to perform much better

Jan 12, 2013 | 2004 Dodge Ram 1500

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Car is shifting wildly and o/d off light is flashing

cud be many things with an old trans-ther very complex--but 1st make sure fluid is full-testit while runnin-shud be red and not gritty feelin--changeit with new filter if not--tv or throttle valve may need ajustin too--some units have sensors and ther own computer--bring it to a reputable mech if no relief--caution-alot of trans guys are liars

Aug 08, 2011 | 1998 Ford Taurus

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My transmission is slipping oil when you floor it

Before guessing at transmission problems, check the fluid level (carwarmed up, engine running in Park on level ground) and have the PCMscanned for trouble codes FIRST.

Secondly, put a line pressure gauge,(or visit alocal trans shop) on the pressure test port and go for a drive toverify proper line pressure. Base pressure at idle in P,N,OD should bearound 70psi and around 140psi in R. Max line pressure should be atleast 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressureis low, trans or pump is worn out. If max pressure is low, check EPCsolenoid. If reverse is slow to engage, and line pressure does not comeup to at least 130psi in reverse, replace the boost valve with aTransgo 0.490" boost valve (easy fix in pan).

Slow, slipping or no reverse: “lo-reverse” clutches are wornout, fluid leak in the reverse apply circuit, or broken sunshell. It ispossible to remedy a fluid problem by removing the checkball from itscage in the case in the rear of the trans may help (must removevalvebody), or adding a high-viscosity additive such as LucasTransmission additive or other seal restorer product. May also haveworn boost valve (can replace in the pan).

Soft shifting, gradual performance degradation: Poor linepressure rise due to leaking boost valve, clogged EPC filter screen,failing EPC solenoid, or worst case: leaky seals throughout. TransgoHD2-C kit fixes first two without removing trans. Seal restorer may fixlast problem, but probably R&R. Also try a transmission flush withBG brand products (Firestone stocks it).

1-2 or 2-3 shift is slow/soft above part throttle: Trans is on its way out. R&R.

Good luck and hope this helps. keep me posted, be glad to help you get your transmission running 100% again soon and thank you for using Fixya.

The best up grade you can do for your transmission is to replace the servos with a Corvette Servo, there go for around $45.00 and can be replaced without removing the transmission pan and also replacing the Boost Valve with a 0.490 or 0.500 Boost Valve. The other inprovment that will help your transmission would be adding a B&M Shift-plus Electronic Shift Improvement kit, part # 70380 Cost around $45.00 if not less.

Feb 26, 2010 | 1997 Chevrolet Blazer

1 Answer


It would be cheaper to fix the automatic

Feb 23, 2009 | 1999 Ford F350 Regular Cab

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Swap out auto trans for manual trans?

The first link is a guide on how to perform the swap, and the second is just someone selling some of the needed parts.

Feb 12, 2009 | 1995 Pontiac Firebird

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Timing belt and routine maintenance

I would get the belt from Mitsubishi because their belt seems to last in your situation.

Jan 29, 2009 | 2003 Mitsubishi Lancer

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Trans axle and transmission are the same in a front wheel drive car. After 25 oil changes, the trans fluid probably should be replaced anyway, if never done yet. Pontiac/Toyota do recommend synthetic trans fluid, which is quite pricey per quart from the dealer. If you did drain the trans fluid, and didn't replace it, chances are you wouldn't be driving right now. I do wonder how oil change #26 went wrong? Not criticizing, just wondering. Hope this helps.

Oct 15, 2008 | 2004 Pontiac Vibe

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