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big block or small?

Discussion in 'The Garage' started by sandracer0004, Jan 19, 2004.

  1. sandracer0004

    sandracer0004 1/2 ton status

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    guys i just picked up a 28' sierra toy hauler to haul my quads in, weight is around 7k empty, currently my truck is a 89 burb, 6" lift, 36" tsls 4:10 gears. 350, and 700r4, i know this is a weak ass setup and need to upgrade, im wondering if i should sell he truck and get a dually, or if i should replace the motor trans? i already upgraded to a 14bolt rear and a d44 front any suggestions on beafing up drive train?
     
  2. Cmoe

    Cmoe 1/2 ton status

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    Where are you taking all the fun toys? The Burb is never going to give you gas mileage. The weakest part of your vehical now is the 700r4.... the 241 (I think you have) should do fine with towing.... you may want to go with a manual trany or a t-400...
     
  3. SUBFAN

    SUBFAN 1/2 ton status

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    T 400 would work great in that set up....

    Start collecting the parts, and run the current set up. keep the tranny cool and stay out of OD when you tow and it should last.
     
  4. mudjunkie 82

    mudjunkie 82 1 ton status GMOTM Winner

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    Supercharged Big Block......... /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif
     
  5. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    I think all you need is like a 4.88 gear ratio. That Th700R4 should be fine with a shift kit and a good cooler.
     
  6. 84_Chevy_K10

    84_Chevy_K10 Banned

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  7. Z3PR

    Z3PR Banned

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    [ QUOTE ]
    5.13s

    [/ QUOTE ] Not for hauling things on the big road with 36" tires. Be over reving that motor big time with 5.13's. Unless you want too go real slow.
     
  8. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    [ QUOTE ]
    Not for hauling things on the big road with 36" tires. Be over reving that motor big time with 5.13's. Unless you want too go real slow.

    [/ QUOTE ]
    Agreed...4.88's.
     
  9. Z3PR

    Z3PR Banned

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    [ QUOTE ]
    [ QUOTE ]
    Not for hauling things on the big road with 36" tires. Be over reving that motor big time with 5.13's. Unless you want too go real slow.

    [/ QUOTE ]
    Agreed...4.88's.

    [/ QUOTE ] I was thinking 4.56's, but then again, I don't have overdrive.
     
  10. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    [ QUOTE ]
    [ QUOTE ]
    [ QUOTE ]
    Not for hauling things on the big road with 36" tires. Be over reving that motor big time with 5.13's. Unless you want too go real slow.

    [/ QUOTE ]
    Agreed...4.88's.

    [/ QUOTE ] I was thinking 4.56's, but then again, I don't have overdrive.

    [/ QUOTE ] Well OD wouldn't matter when towing anyway but yeah 4.88's are probably the lowest I would wan't. Actually 4.56's on the highway cruising in direct drive would be about right to me because you would cruise at about 2,800 RPMS. It would be sluggish stop to stop though.
     
  11. K1Orion

    K1Orion 1/2 ton status

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    If its strictly a tow rig, why not go a with a little smaller radial tires (35" radial, take your pick) and do some simple mods to the motor for more power. Maybe headers and intake. And a big cooler for the 700.
     
  12. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I have 4.10s and 31s on my tow rig. If you do the math, to get the same ratio, he'd need 4.88s. I pesonally think a little more gear never hurts when pulling, so 5.13s it is.

    Puts you right around 2900-3100 pulling down the road, which is perfect. I'm at 2700-2900 and I would welcome the additional "boost" in gear.

    I say again, 5.13s. /forums/images/graemlins/thumb.gif
     
  13. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    [ QUOTE ]

    Puts you right around 2900-3100 pulling down the road, which is perfect. I'm at 2700-2900 and I would welcome the additional "boost" in gear.

    I say again, 5.13s. /forums/images/graemlins/thumb.gif

    [/ QUOTE ]
    I still say thats too low and heres why: with a 4.56 or 4.88 gear ratio he would have plenty of power on flat ground running down in the 2,400 to 2,600RPM range and would save a little fuel over lower gears not to mention quiet down the exhaust a little if his isn't stock.
    How about when he comes to a hill? With 5.13's he will still probably have to drop a gear pulling a hill anyway so when he drops to 2nd that thing is going to scream. With 4.56's or 4.88's it would be a little better pulling hills in 2nd gear.

    We would only know whats perfect though if we could test each ratio in his conditions so who knows who is right. /forums/images/graemlins/thumb.gif
     
  14. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Well, to each his own. If I could have 4.56s with 31s for pulling, I would. You can hardly ever have enough gear when you're pulling something.

    Apparently GM agrees with me too. This truck came from the factory with 245/75R16s and was only available with 4.10 or 4.56 gears.
     
  15. K1Orion

    K1Orion 1/2 ton status

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    5.13 /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif OK Zakk,Jr.

    In real life, not your web world; why go from 4.10 to 4.56 or 4.88 to tow? Thats a lot of coin for a tow rig. If he can find 4.56 axles for cheap, swapping them in might be a little more reasonable, but why pay the $$$ to regear and get such a small gain?

    I say 35s and engine mods or a big block, to answer the question in the title of the post. /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif
     
  16. 84_Chevy_K10

    84_Chevy_K10 Banned

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    The reason is that the factory geared tow rigs that way for a reason. As I said, 1 ton trucks commonly came with 31-32" tall tires and ONLY came available with 4.10 or 4.56 gears for a reason.

    The logic is simple. If it takes 4.56 gears to get 10,000 lbs of towing capacity with a 350 and 31" tires, then it takes 5.13s to match this with a 36" tall tire. GCWR on a 1 ton rig with a 350 and 4.56s is 16,000 lbs or so. Subtract the weight of the trailer (his is 7 k empty, so say its 8k loaded) and that gives you 8k lbs left for the tow rig. A Surburban can easily weigh 6500 lbs, which gives you 1500 lbs of cushin. I think that's a good way to think of it....makes perfect sense to me.

    Sure, mods to create more power will work too, but gearing the engine into an RPM range where more power is available in the first place is a better option for towing IMO.

    I wish my tow rig had more gear every time I get something heavy behind me, and this is Illinois. I imagine anywhere where there's hills and it'd be even worse. I have been slowed down to about 50 mph towing down I39 from Rockford to La Salle where there are just some mild hills. Downshifting, even with 4.10s is not an option as that would make the engine scream too high. A little more gear would net quite a bit more usable pulling power in my opinion.

    Zakk jr., sure, but I believe that I've got good justfication to believe that if GM wants that much gear in a tow rig, so should we. /forums/images/graemlins/thumb.gif
     
  17. Emmettology 101

    Emmettology 101 3/4 ton status

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    On the big block or small block topic... I always liked the phrase:

    "There is no replacement for displacement!
     
  18. sandracer0004

    sandracer0004 1/2 ton status

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    ok guys, its a 28' sierra toy hauler, it weighs 7k empty, i have a load leveling hitch, and im pulling 4-5-6 quads in it. so loaded with quads, fuel, water and supplies im right around 9-9500 lbs.

    father in law says that the 1/2 ton burb is diff then the 3/4 ton burb, mines a half with d44 and corp 14 swaped in? is it diff? ive got stainless lines and im swaping in disks in rear, also have 3/4 leafs, and 1 ton overloads, also installing air bags.

    is a burb enough truck for this much load? or should i go crew cab dually with 454? i was thinking maybe rebuilt 383 would replace motor, and a th400 and 205 for trans? i just want reliable. i drive to work but can live with 8mpg, i was also planning on going to a 35" all terrain since it is 99% in the sand.
     
  19. POWERMAD

    POWERMAD 1/2 ton status

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    [ QUOTE ]
    i drive to work but can live with 8mpg

    [/ QUOTE ]
    A man after my own heart.
    Since I own a BBC powered rig I would have to say go to a mild 454. 450 HP 500 torque.
    I don't give a crap what gearing you have if the plant is screaming and you are going up a grade just a bit faster than you can walk....
    Case in point.
    The one outfit I worked for had an 80 1 ton dualy 4x4 fully equiped service truck with 4:56 gears and a 350.
    On service calls it was a sore spot with us when we would be trying to go up the hill and loaded log trucks would be passin us with their flashers on. I never could get that engine to blow.
    Nothing like 6K at 40 MPH for 10 minutes trying to get up the hill.
    On the other hand my 73 with 3:73 gears and 33's will pull that same hill with 3000lbs in the back and hit 90 half way up.
    2 mile 8% grade.
    T400 with a big cooler. 13 mpg on the hwy and she holds 55 gallons of fuel. /forums/images/graemlins/thumb.gif
     
  20. sandracer0004

    sandracer0004 1/2 ton status

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    are you claming 13mpg with a bb? dam! i had no idea i could get that kind of milage, i only get about 9 now with my 350.
     

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