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? about towing

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by GONZO, May 25, 2001.

  1. GONZO

    GONZO Registered Member

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    Location:
    Great Falls MT
    anyone know the factory tow ratings for the 85-88 blazers?
    thinking of towing one of my cars cross country with my wife's 88 blazer. total weight would be around 5200lbs the loaded trailer. i would take the 33's off and put the stock 235/75's back on for the trip.
    also, who makes a good tranny cooler for the 700r?

    <font color=blue>85 k5 Blazer 4x4
    99 Trans am 30th anniversary
    79 Trans am [​IMG]
     
  2. dyeager535

    dyeager535 1 ton status Premium Member

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    Maybe someone else has some ideas, but I'd say with an '85 with a 700, its a real bad idea to tow that much weight, even with a trans cooler. I'll let others fill you in on their experiences, if there are any. My '83 tranny went in the mountains/hills of Arizona, fully loaded but not towing anything.

    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     
  3. tori89k5

    tori89k5 1/2 ton status

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    Dont let everyone else's bad experiences with the 700R4 trans scare you from using your rig. If used properly you can tow that amount just fine. I towed 7,000 lbs with my 84 K10 and it had 1500 lbs in the bed, we towed from Illinois to Califonia without any problem. Get a good size tranny cooler from any autoparts store, and you'll be fine. I tow in OD also, but only do it on flat level ground when you can maintain your speed easily, if you come to an incline, just drop it back to D
    Look on my web page under my past toys and you will see this exact truck and the load we had on it. It was taken the day we moved to California.

    STOLEN '89 K5 - 4" lift. Found in Compton (go figure)
    stripped and dismantled.
    <A target="_blank" HREF=http://www.tori89k5.coloradok5.com>http://www.tori89k5.coloradok5.com</A>
     
  4. Storm Trooper

    Storm Trooper 1/2 ton status GMOTM Winner

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    Location:
    Dillon Colorado, Hang'in in the mountains. Renting
    Ask tRustyK5, I think he will tell you you'll be ok.....
    Just take it easy and let all of us know where your going in case you need K5 ROADSIDE ASSISTANCE. hehe

    [​IMG]<font color=red>[/b]"Rid'in HigH in my K5"[​IMG]
    ....[​IMG]<font color=blue>[/b]"6" Lift -<font color=purple>38.5's"[​IMG]....
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    E-town baby!
    I was towing 3450 lbs or so...I scaled at 9500 lbs combined. Honestly I kept forgetting it was back there...[​IMG]
    Every once in a while I'd check the rearview and for half a sec think to myself "Damn that guy is close!"

    One thing though, I don't have a 700R-4, I have a SM 465 4 speed. You're gonna be close to 11,000 lbs combined and that is a lot for a 700R-4.

    I can however vouch for the CK5 roadside asistance plan..you've never seen service like that before I can guarantee it!!![​IMG]

    I'd ask a tranny shop for their opinion. I also swapped to my towing tires for the trip...35" General MT's...[​IMG]

    Rene

    <font color=red>If at first you don't succeed...skydiving ain't for you!</font color=red>
     
  6. dyeager535

    dyeager535 1 ton status Premium Member

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    "I'd ask a tranny shop for their opinion. I also swapped to my towing tires for the trip...35" General MT's..."

    Also known as OD for the Sm465 : )


    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Nope those are my little tires...[​IMG] Even I wouldn't take 36" bias Swampers on a 5000 mile drive!

    My cruise RPM is 2500 RPM with the Generals on. They actually measure out to be 33.5" true diameter. The Swampers measure out to 35.5" and would be slicks by the time I got home.

    Rene

    <font color=red>If at first you don't succeed...skydiving ain't for you!</font color=red>
     
  8. Bone85K5

    Bone85K5 1/2 ton status

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    Ive been through a few 700r4's over the years ion various K5's and Suburbans. Our tranny guy tells us the same thing very time: "These trucks have the power to tow. The dont have the gears to tow. It your a 1/2 ton, with stock gears, tow and 60 mph NOT in OD. ANyhitng else and you ARE wearing out the tranny, its just a matter of time. Again this is with stock gearing.

    Ben
    www.BenjaminBone.coloradoK5.com
     
  9. GONZO

    GONZO Registered Member

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    the towing will be done with my wife's 88 blazer not my 85.
    it is stock geared (whatever those are?). the 700r was just replaced with a rebuilt one last dec. in the middle of my last trip across the country.
    i considered using my 85 for the tow, but not sure if it will be ready in time. plan on adding 2" lift, new 33's, replace ball joints and other little odds and ends also, a good tune to the 350, and possibly a few performance parts to increase power a little. my 85 is running a 3spd auto with 4.10 gears and 32's right now. it tends to rev a little high on the highway. hopefully the 33's will bring that back down a little.

    <font color=blue>85 k5 Blazer 4x4
    99 Trans am 30th anniversary
    79 Trans am [​IMG]
     
  10. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Location:
    Cochrane, Alberta, Canada
    Gonzo- If you can find your code list somewhere on your truck(glovebox door, inner fender well, etc....), here's the factory codes for gearing:

    GU4- 3.08
    GU5- 3.23
    GU6- 3.42
    GT4/5X1- 3.73
    GT5/GT8- 4.10
    G80- Limited Slip Diff

    I would honestly recommend staying out of overdrive while towing. I know Tori said he did a large trip and used overdrive, but I have seen TOO MANY 700r4s fail because of heat, and OD with a load will heat a tranny up in a hurry. I do agree with Tori about one thing- don't be scared!!!! I use a 700r4 to tow through the Canadian Rockies every summer. The longest hill I take is about 10 miles long averaging about 10% grade. It takes a while, but I get up everytime. Just use a big aux. cooler and, if you're really worried, install a tranny temp gauge to help you monitor things along the way.............





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