Transmission issue

my tacoma feels like I get rear ended when I stop rather hard. A second or two after coming to an abrupt stop my truck feels like I have gotten rear ended. What could cause this problem? I'm guessing the transmission. I also found a small drop of oil near the drive shaft and transmission connection

 

That rear seal is known to leak.

The thuds u feel is axle wrap... your rear leafpack is weak.

Get an add a leaf, or a new leafpack and it should fix it.

 

I'm new to suspension issues. Do you mean the lead springs? I took a look and did notice one side has more spacing than the other

 

Leaf springs in the rear.

Urs probably look like they are frowning right?

Should have a positive arch.

 

Yes. They don't have that nice bow like bend any more

 

Yeah, ur best bet is a new leafpack then... if flat, an add a leaf may buy some time but if ur in the negative, u may need a new pack instead.

do you haul on a regular basis?

 

No don't tow anything but I did buy it used. Thanks for the info. Lots of help. Thank you once again!! On my way to get some new leafs. Great info

 

Or MAYBE they can be re arched by a shop, and then combined with an aal.

 

I have an o7 with new leaf springs as they just replaced the frame a year ago ...Im having this problem too and also at 40mph it feels like I have a tire out of balance or a bent rim I don't though .... took driveshaft off and to a reputable shaft shop for a new balance and u-joints but the problem still remains did wheel bearing too (all 4 ) any help would be very much appreciated