sorry for my poor english because I'm from poland.

I have xj from 1993 with 2,5 petrol engine and chrysler 8.25 on the rear.



I found something like this on the ebay:
http://www.ebay.com/itm/Chrysler-Mopar-Jeep-8-25-SureGrip-Posi-Locker-27-Spline-/301237026027?pt=Motors_Car_Truck_Parts_Accessories&hash=item4623203ceb&vxp=mtr#viTabs_0
Can somebody write something about this lock on the pictures ?We don't have any information about this. What is the real producer ? How does it works ? Is that good and strong or piece off shi... ? Is that typicall LSD or something else ?
Please for answer

 

I've never heard of that brand but that doesn't mean it isn't any good.
Personally if I were to buy an inexpensive locker I would stick with the better known brands like lock-rite, Aussie locker, Spartan etc...

BTW.. the ebay ad says it ships to the US so if you're in Poland, you might want to make sure you can get it shipped to you.

 

thank You for answer.
But I don't want to buy this brand. I put this images and link from ebay to show what I have in my chrysler 8.25 in my xj. I only need a information about this lock.

 

Suregrips were the early design of chrysler posi units. They are a cone style unit and when they wear out they can not be rebuilt and must be replaced. I would look for a standard Trac-lok instead. They use clutches and can be rebuilt.

Max

 

I was today in jeep servive in my town and I show the picture with this lock to service man..he told me that is very good and old Mopar lock...he told that is much better than typicall LSD in Dana 35 and very simple and cheap to fix..at the end he sayed that if I want brake this lock , I will must try very hard because this lock is very strentgh...old good chrysler

 

Is it really a locking diff?.......looks more like a limited slip and there is a difference in performance.

 

It's limited slip. I ran them during the muscle car era. They are tough and are one of the quicker responding lsd. This may help the OP.

Sure Grip
"Sure Grip" is the Chrysler name for a limited slip differential. It was optional on the 8-3/4" axles, 1958-1974.
Two styles were used.
1958-1969 used the Dana Power-Lock Pt# 2881487). This unit utilized clutches for the differential locking action. The Power-Lock can be rebuilt using kit # 2070845 ( Mopar Performance PT # P4529484 ). In this assembly, axle drive shaft end thrust is taken by the thrust block assembly (replacement # 2881313). This Sure Grip appeared in the 741 and 742 assemblies. The axle bearings are: 25590 Timken cone, and 25520 cup, Chrysler numbers 1790523 and 696403).
The Dana Power-Lock can be recognized by its bolt-together assembly, bolts around the side opposite the ring gear, and multiple openings exposing the cross shafts.
1969-1974 used the Borg Warner Spin Resistant (# 2881343). This unit utilized a spring-preloaded cone friction arrangement for the locking action. Axle end thrust is taken by the cross shaft.
This Sure Grip appeared in 489 assemblies and 70 and later 741/742 assemblies.<br>
The differential axle bearings are:LM 104912 (Timken cone), and LM 104949 (Timken cup), (Chrysler numbers 2852729 and 2852728).
The Borg Warner Spin Resistant unit can be recognized by its lack of bolts on the side opposite the ring gear (like the Dana), and two openings exposing the preload springs.
Borg Warner sold this design to Auburn Gear who currently offers the replacement Sure Grip assemblies.
Non-Sure Grip differentials can be identified by the large openings in the differential exposing the differential (aka. spider) gears. There are no springs or clutches.
The two Sure Grip types can be interchanged between the carriers if the matching differential axle bearings are retained. The outside diameter of the cups are the same between the 741/742 and the 489, the inner cone differs.
The Sure Grip differential can be used as a direct replacement for the non-Sure Grip within the carrier/bearing limits previously noted.

 

I was pretty sure it was a lsd, not a locker.

Great info, thanks for your post.

 

Your WELCOME.