Forum Discussion
APT
Aug 20, 2014Explorer
Here we are again with the gearing. The GM 6-spd has two overdrive gears. So what? It also has a first gear that is 32% shorter than GM's prior 4-spd. GM 6-spd is is similar to the 4-spd with 4.56 if you only use the first 4 gears which is done with the M trans mode. Actually, it's better because first gear is similar, gear spacing is narrower, and you probably have 5 usable towing gears instead of 4. Is 6-spd/3.72 better for towing? A little. Is Ford's Ecoboost better? Absolutely. But OP is going from a 90's Dodge gas 5.9L with very poor 4-spd gearing. The 2009 Tahoe will accelerate much better and use less fuel.
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Anyway, power will not be your problem. You do need to confirm the axle ratio and HD towing package/trans cooler. Look in the glove box for a sticker with list of RPO codes. GU6 = 3.42 and K5L for the trans cooler. With those, tow rating is over 8k pounds. Payload may be exceeded well under that if you have a large family. Receiver limit at 1000 pounds is another limit typically at under 8k loaded RV.
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Anyway, power will not be your problem. You do need to confirm the axle ratio and HD towing package/trans cooler. Look in the glove box for a sticker with list of RPO codes. GU6 = 3.42 and K5L for the trans cooler. With those, tow rating is over 8k pounds. Payload may be exceeded well under that if you have a large family. Receiver limit at 1000 pounds is another limit typically at under 8k loaded RV.
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