2021 Suburban. How Much Trailer?
I just ordered a 2021 Z71 Suburban with the Max towing package. I don’t have it yet, so I don’t have the details provided on the yellow sticker inside the door. The manufacturer indicates 8,100 lbs as...
Forum Discussion
Found a bit of time to read up on the 2021 Suburban...
It has +4.x inches more wheel base (longer) and guessing took advantage of the fixed diff pumpkin. Articale also says the rear passenger doors are wider because of the increase of wheel base
Here is the image of the new IRS...still looking for an image or diagram of the pumpkin and its super structure
A different approach from the Expedition, which has a kinda sorts traditional lower link/arm. With the change just off square to manage forward thrust, but still a cantilever moment. Am still not sure the precision requirements of any IRS will have those precision joints sized for towing heavy
GM’s approach is to have a trailing link in line with the forward vector and is frame rail mounted...instead of to the diff structure (cross member between both frame rails
Air bags and not convoluted (doesn’t have the hinged lift), but smooth sided
Now wonder how nimble vs the shorter design.
Remember, GM’s marketing demanded (required via spec) to have the receiver hidden. So the designers incorporated the receiver into the bumper. Behind the plastic trim.
Since now part of the bumper, the receiver cross tube (torque tube) has crumple zone duties (requirements) and the why it only had a 1,000 lb max WD rating. Now the reported ‘new’ max 790 by Bryan...wonder what else they did back there?
IMO....GM continues to target the overwhelming numbers of owners who do NOT tow, but ride quality of paramount importance...towing heavy is just a side note...
Also, from the image, think the rear frame rails are too small for after market receivers trying to increase the tongue weight rating. Maybe those receivers will have a higher weight rating...but the frame rails will become the weak link.
Will delve deeper when time permits
It has +4.x inches more wheel base (longer) and guessing took advantage of the fixed diff pumpkin. Articale also says the rear passenger doors are wider because of the increase of wheel base
Here is the image of the new IRS...still looking for an image or diagram of the pumpkin and its super structure
A different approach from the Expedition, which has a kinda sorts traditional lower link/arm. With the change just off square to manage forward thrust, but still a cantilever moment. Am still not sure the precision requirements of any IRS will have those precision joints sized for towing heavy
GM’s approach is to have a trailing link in line with the forward vector and is frame rail mounted...instead of to the diff structure (cross member between both frame rails
Air bags and not convoluted (doesn’t have the hinged lift), but smooth sided
Now wonder how nimble vs the shorter design.
Remember, GM’s marketing demanded (required via spec) to have the receiver hidden. So the designers incorporated the receiver into the bumper. Behind the plastic trim.
Since now part of the bumper, the receiver cross tube (torque tube) has crumple zone duties (requirements) and the why it only had a 1,000 lb max WD rating. Now the reported ‘new’ max 790 by Bryan...wonder what else they did back there?
IMO....GM continues to target the overwhelming numbers of owners who do NOT tow, but ride quality of paramount importance...towing heavy is just a side note...
Also, from the image, think the rear frame rails are too small for after market receivers trying to increase the tongue weight rating. Maybe those receivers will have a higher weight rating...but the frame rails will become the weak link.
Will delve deeper when time permits
Moderator edit to re-size picture to forum recommended limit of 640px maximum width.
