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Towing capacity/transmission K1500 5.7L 4L60E

This is a discussion on Towing capacity/transmission K1500 5.7L 4L60E within the Technical / Maintenance forums, part of the General Discussion category; Hey Yall, I've got a towing capacity/transmission question. I have a 1995 K1500 5.7L with a 3.42 ratio and a ...

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    Towing capacity/transmission K1500 5.7L 4L60E


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    Hey Yall,

    I've got a towing capacity/transmission question. I have a 1995 K1500 5.7L with a 3.42 ratio and a 4L60E transmission and about 160,000 miles. Truck runs great and I love it. I'm moving back home (from Idaho to Virginia - 2200 miles) in a few months and would like to tow our subaru legacy wagon which has a curb weight of about 3250 lbs. My truck, with me, dog, gas, shell, and misc. has a curb weight of about 5400 lbs (GVWR of 6100lbs). I'm considering renting a uhaul car trailer that weighs about 2000lbs. So, trailer plus subaru equals about 5250lbs. My truck has a hitch with 7500/5000 (WD/WC) capacity. I don't ever do any towing, but I would think that the truck could handle that weight. If the weight is a problem, I could go with a car dolly, though I think they're pretty dangerous. Anyway, assuming 5250 lbs is OK (let me know if it's not!), do you think I need to install an tranny cooler for this trip? If so, any recomendations? If needed, an inexpensive and easy to install cooler would obviously be desired. As a "non-tower" I'm looking for any advice on what I need to do to get this subaru to VA. Thanks for all your help. Jeb.

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    Registered User Stevens07's Avatar
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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    Def. install a transmission cooler. Your 3.42's are whats going to hurt you. Not the best towing gear. I'm sure your truck has a tow rating of at least 6500lbs but not positive. Still think you'll be fine if you take it easy.


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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    As long as the trailer has brakes, you leave plenty of stopping distance and you're highway towing in drive, you should be all set.

    I would highly recommend installing a transmission cooler. HIGHLY recommend it.
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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    you should be fine, i would definately install a tranny cooler though for that trip. my truck has 3.73 gears, havent driven one with 3.42 gears so i cant help you there. turn the tow/haul ON, and if you notice it struggling up hills take the tranny out of drive and leave it in 3, that will help keep your tranny and engine temps down. ive pulled a 20ft x 9ft enclosed loaded full moving someone with my 5.3/4L60-E, it did ok pulling it.

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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    Found this with a quick google.

    http://wiki.answers.com/Q/What_is_th...towing_package

    Towing capacity with an empty truck bed is 6,000 pounds. Towing capacity with a fully loaded truck bed is 4,800 pounds. The gross combined weight rating is 11,000 pounds.


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    Registered User Stevens07's Avatar
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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    Found 7500 lbs towing capacity for your truck.


    2007 GMC Sierra SLT Vmax 4.10 gears, Boss MT100 20x8.5 wheels/Cooper Zeon LTZ tires, Extang Bed cover,
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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    I would definately put in a tranny cooler and don't tow in OD. 4L60E are not the strongest trannies out there, especially with 160,000 miles on it. I would also do the car hauler that has brakes for safety in stopping. You might have to hook up a brake controller but I think it would be worth it.

    Wayne
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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    Thanks for the quick response. I was just looking at B&M supercoolers as these appear to be recommended in other posts. They look easy to install. Would this work (see link)? Any extra fittings or installation advice?

    http://www.jegs.com/i/B&M/130/70264/10002/-1

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    wtd
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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    B&M is a good brand. I think thats the brand I used years ago on my 93 S-10 4x4. They are easy to install. The cooler itself is usually mounted directly to the AC condensor with zip straps. You then figure out which are the entry and return tranny lines that go into your radiator. You unhook these and attach them to the correct ports on your cooler useing the supplied lines and clamps to do this.

    Some people use metal straps to install the cooler to the core support.

    On my S-10, I didn't do any cutting on my factory tranny lines. I just slid back the threaded nuts that secured the lines to the radiator and hose clamped the new rubber lines to the end of the factory lines. You might have to bend the factory lines slightly.

    Another option would be to go to the junkyard and pull of the cooler and factory lines off of a truck that is equipped with the towing package. I see them in the yards here all of the time. The factory coolers are supposed to actually be very good. If you go this route just make sure to flush the cooler and lines out incase the vehicle had a tranny failure. Good luck.

    Wayne
    98 ext-cab Z-71 5.7L/4L60E/10 bolt/3.73 locking diff
    Borla duel rear exit exhaust, HD bilstein shocks LT265/75R16 Michelin LTX A/T tires

    98 reg cab long bed K3500 4x4 7.4L/4L80E/14 bolt FF/4.10 locking diff. Flowmaster Cat-back, LT245/75/16 Michelin LTX M/S tires.

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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    I put a B&M supercooler on my truck (92 in sig) and it's been doing great!! I'm way more than happy with it. the other thing I would HIGHLY recommend is a transmission temperature gauge of some sort. It is very helpfull to know when it's getting too hot (about 220* is as hot as I let mine get), so you can yank it down a gear or let off the gas a little bit.

    Do a gauge and a cooler, and you should make it no problem. And when you get there, drop the pan, and change the filter and refill with new fluid. And if you can, get a trailer that has brakes, and install a brake controller. It will make your life much easier since you'll be going over the rockies.
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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    I've got a 91 K1500, 3.42s, 5.7, and it's pulled a '99 ECSB Z71 on a full car trailer about 200 miles, but it does have a trans cooler. It's also pulled my 85 Trans Am on a u-haul trailer before. I don't like the dollies either, and most of the u-haul trailers have hydraulic brakes already installed, so no need for a brake controller. I'd recommend a trans cooler, and don't tow in OD.
    Last edited by nomind; 09-30-2008 at 10:41 AM.

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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    Thanks guys,

    I'll go with the B&M 70264. Installation looks easy enough and maybe it will give me more life out of that 4L60E regardless of the towing.

    Jeb

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    Re: Towing capacity/transmission K1500 5.7L 4L60E

    I'm driving a 93 K1500, hualing 5 ricks of green oak wood on a 16x7 trailer, and haven't had a problem till two days ago when the tranny blew all to ****. On the other hand, I've been doing that for about a year, and averaging about 500-800 miles a week, mostly fully loaded. I found a junkyard 4L60-e for 350, no core, and a 30 day warranty. Not too bad, i think. I'm gonna take it kinda hard, on the "used" tranny, just to make sure it will take the abuse.

 

 

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