1987 pickup differential replacement

Hi,

Got a 1987 4sp MT 22R eng, no problems really until yesterday. In reverse some serious hang-up and clunking. Brakes and u-joint checked out okay. Removed the prop shaft and sure enough it still catches and even stops the truck when moving in reverse, but no problems whatsoever going forward. So I'm down to the diff.

I'm looking at a part at: http://www.autopartswarehouse.com/sku/Toyota/Pickup/Lock-Right/Differential/1987/Base/4_Cyl_2-dot-4L/PTX1620-LR.html?loc=Rear

I'm told I can replace the "pumpkin".

1. Is that what's called the "pumpkin" in the link above?
2. It states: "replaces the spider and side gears only; The rest of the differential gears are not included with this item as it retains the OEM ring and pinion setup for easy installation." I'm thinking the problem may be clutch plates in the diff housing (from other reads) but I am unfamiliar with the diff in general. Would that part have the clutch plates in there?

Thanks,

~Dan

"Hard pressed on my right. My center is yielding. Impossible to maneuver. Situation excellent — I attack!"
Ferdinand Foch, great French general, WW1.

Pumpkin is a slang term for the differential. Toyota trucks have a removable diff also refered to as a third member or third for short.

Your link is a locker, it provides full power to both wheels in low traction situations. A normal (open) diff sends the power to the wheel with the least amount of traction, which doesn't help you get unstuck.

This is a Toyota diff/third

http://www.northwestoffroad.com/images/parts/diff31a.jpg

Used ones can be found for $50 or so for one with a 4.10 gear ratio (the most common). Other ratios go for more.

Thanks fourwd1,

I didn't notice the post till just now. Ya, that is my diff pictured there. How do you post a picture like that??

Been under the weather so haven't worked on it yet, but it may turn out not to be the diff but rather a sticky brake piston; should know in a few days.

Thanks again for the post.

~Dan

Ps. "Third member"? Is my mind in the gutter or is there a better reason it's called that?

I don't remember the origin of the term.

To post a pic, it has to be hosted elsewhere on the net, then you link to it using the little postcard icon at the top of the reply box.

thanks. still working on the diff!